Checklist of diatoms (Bacillariophyta) from Lake Ohrid and Lake Prespa (Macedonia), and their watersheds

ZLATKO LEVKOV; DAVID M. WILLIAMS

During recent observations of the diatom flora of Lake Ohrid, fifteen new species were found, each possessing unique morphological features: Odontidium minutum, Gomphonema linearoides and Gomphonema densistriatum. We provide detailed descriptions for all fifteen species based on light and electron microscopy observations. Noteworthy is the high diversity recorded in the Gomphonema olivaceum species complex, which comprises eight species in total, three of which are described as new. We also provide a key for identification of species in the G. olivaceum complex in Lake Ohrid and a compilation of published data detailing the infraspecific diversity of this complex.

Two new species of Diatoma, Diatoma angusticostata and Diatoma densicostata are described from Lakes Ohrid and Prespa. Both species are described from light and electron micrographs and compared with many of the taxa currently placed with—but poorly understood—Diatoma vulgaris. We add further commentary on the genus Diatoma.

The genus Surirella is highly diverse and many taxa are reported as endemic, especially from ancient lakes and tropical continental regions. In ancient Lake Ohrid, 25 different Surirella species have been identified by different authors, five are considered to be endemic for the lake. In contrast, research on its sister Lake Prespa has been less rigorous and data for recent and fossil species of Surirella is very sparse. The number of Surirella taxa reported from Lake Prespa is 11; only one is considered an endemic for both lakes, Ohrid and Prespa. In this study, taxa from the genus Surirella were observed in a number of recent and fossil samples from Lake Prespa. Two taxa possess unique characters that distinguish them from known species. Their formal descriptions, based on detailed LM and SEM observations, are presented here. Surirella subrotunda sp. nov. is differentiated from other similar species by its valve outline, size, and shape of median area; it has been observed only in fossil diatom samples from core Co1215 recovered from Lake Prespa. Surirella parahelvetica sp. nov. is distinguished by its size, valve outline, number of alar canals and stria density.

Phytotaxa 45: 1–76 (2012) www.mapress.com/ phytotaxa / Copyright © 2012 Magnolia Press Monograph ISSN 1179-3155 (print edition) PHYTOTAXA ISSN 1179-3163 (online edition) PHYTOTAXA 45 Checklist of diatoms (Bacillariophyta) from Lake Ohrid and Lake Prespa (Macedonia), and their watersheds ZLATKO LEVKOV1 & DAVID M. WILLIAMS2 1 Institute of Biology, Faculty of Natural Sciences, Gazi Baba bb, Skopje, R. Macedonia Email: zlevkov@iunona.pmf.ukim.edu.mk (corresponding author) 2 Department of Botany, The Natural History Museum, Cromwell Road, London, United Kingdom Magnolia Press Auckland, New Zealand Accepted by P. Novis: 1 Feb. 2012; published: 15 Feb. 2012 ZLATKO LEVKOV & DAVID M. WILLIAMS Checklist of diatoms (Bacillariophyta) from Lake Ohrid and Lake Prespa (Macedonia), and their watersheds (Phytotaxa 45) 76 pp.; 30 cm. 15 Feb. 2012 ISBN 978-1-86977-857-6 (paperback) ISBN 978-1-86977-858-3 (Online edition) FIRST PUBLISHED IN 2012 BY Magnolia Press P.O. Box 41-383 Auckland 1346 New Zealand e-mail: magnolia@mapress.com http://www.mapress.com/phytotaxa/ © 2012 Magnolia Press All rights reserved. No part of this publication may be reproduced, stored, transmitted or disseminated, in any form, or by any means, without prior written permission from the publisher, to whom all requests to reproduce copyright material should be directed in writing. This authorization does not extend to any other kind of copying, by any means, in any form, and for any purpose other than private research use. ISSN 1179-3155 (Print edition) ISSN 1179-3163 (Online edition) 2 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Table of contents Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Discussion: Relevance of the Checklist to further Diatom Studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Methods, Abbreviations and Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Class COSCINODISCOPHYCEAE Round & R.M. Crawford 1990 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Class MEDIOPHYCEAE (A.P. Jousé & A.I. Proshkina-Lavrenko) Medlin & Kaczmarska 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Class BACILLARIOPHYCEAE Haeckel 1878 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Abstract A century of diatom research on Lakes Ohrid and Prespa (Macedonia) has yielded 900 different taxonomic entities including species, varieties and unidentified species. This checklist is based on a comprehensive compilation of diatom names sourced from all available published data. The intention is to provide a basis for future diatom research on these diverse ancient lakes and their watersheds. The checklist is organized around the classification in Round et al. (1990), with a few minor modifications. Introduction Lake Ohrid and Lake Prespa are considered to be ancient lakes; their estimated age is 2–10 my (Stanković 1960; Dumurdzanov et al. 2004; Albrecht & Wilke 2008). Both Ohrid and Prespa form an unusual lake system. According to Stanković (1960), the two lakes were one at the earliest stage of their existence; today, Lake Prespa lies about 160 m higher than Lake Ohrid. Yet some studies have revealed that water from Lake Prespa does flow to Lake Ohrid via karst channels (Anovski et al. 1980; Eftimi & Zoto 1997). Compared to other ancient lakes, Lake Ohrid is relatively small with a total surface area of 358 km2 and maximum depth of 288 m. Despite its size, the lake is characterized by considerable diversity and endemism of aquatic species, including diatoms (Bacillariophyta). According to Albrecht & Wilke (2008), of the 1200 species reported, 212 are considered endemic; no data concerning diatoms were provided. Both Lake Ohrid and Lake Prespa are under strong human influence. According to Matzinger et al. (2006a), a considerable amount of phosphorus is discharged from Lake Prespa to Lake Ohrid, making it very sensitive to eutrophication. On the other hand, the water quality, especially near the towns, is significantly decreased. The littoral region near Podgradeci (40.87°N, 20.70°E) is dominated by tolerant species that grow in a wide range of conditions, from oligotrophic to eutrophic waters (Miho & Lange-Bertalot 2003). Significant changes in planktonic communities have been also observed, with the dominance of eutraphentic species (Mitić 1987, 1990). More recent observations of planktonic communities (Patceva 2005) show considerable changes in species composition, especially in the littoral regions near the mouth of Sateska River. More recently, palaeocological research on Lake Ohrid and Lake Prespa has intensified. Several of these studies show that Lake Ohrid is very sensitive to climate changes (Matzinger et al. 2006b; Matzinger et al. 2007; Reed et al. 2010). It has been suggested that current and potential future human activities will continue to have a major impact on the characteristics of Lake Ohrid, which will most likely affect its levels of endemism (Reed et al. 2010). Bearing in mind that both lakes and their watersheds are threatened by eutrophication, pollution and climate change, compiling inventories of species currently inhabiting them is an important task. This checklist is an attempt to capture current knowledge on diatom research and diatom diversity for both Lake Ohrid and Lake Prespa. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 3 Brief History of Diatom Research The diatom flora of Lakes Ohrid and Prespa has been under investigation for more than a century (Krstic et al. 2006). The first published studies appeared in the first half of the 20th century, focusing primarily on the composition of the phytoplankton communities (Gjorgevich 1906; Georgevitch 1910; Petkov 1910; Fott 1933, 1935). It was not until the second half of the 20th century that investigations on the systematics of benthic diatoms were undertaken, these studies yielding descriptions of more than 70 new species (Hustedt 1945; Jurilj 1949, 1954). Even so, algal research in the second half of the 20th century continued to focus mainly on the plankton communities (Kozarov 1959, 1960a, 1974, Mitić 1985) as well as general studies investigating the vertical distribution of species, their seasonal and annual succession, as well as biomass and production (Allen & Ocevski 1976). A few papers concentrated on the ecology and ultrastructure of the endemic plankton species Cyclotella fottii Hust. (Jerkovic 1969) or the large benthic species of Campylodiscus Ehrenb. ex Kütz. (Jerkovic 1971a, 1972). However, following increased concern with habitat modification and human impact on Lake Ohrid, more intensive studies focused on the influence of eutrophication, indicating which localities had highest eutrophication levels (Mitić 1987, 1990). These papers, although giving a general image of plankton distribution and its response to increased human impact, are important from an ecological point of view, as they provide information about the ecology of particular species as well as the ecology of the lake itself. Most of these studies were orientated towards Lake Ohrid, Lake Prespa being somewhat neglected. However, Miho recently provided a list of 80 algal taxa (mainly diatoms), from Lake Ohrid and Prespa (Miho 1998) while Mitić & Naumovski (2000) recorded 46 taxa in the phytoplankton for Lake Prespa – only eight being diatoms. At the end of the 20th century, diatom species concepts were changing, as narrower views on the variability of the diatom frustule and valves were emerging. This change had a tremendous influence on the diatom research community resulting in the description of many new species and genera. This trend affected studies on Lakes Ohrid and Prespa as well. In the early 1990s many more taxa were being described, beginning with Lange-Bertalot et al. (1991) who described Diatoma ochridana Lange-Bertalot & Rumrich from Lake Ohrid. Later, Lange-Bertalot (1993) described Gomphonema minutiforme Lange-Bertalot & E. Reichardt, and later two new Navicula species from Lake Ohrid—N. parahasta Lange-Bertalot & Miho and N. hastatula Lange-Bertalot & Miho—and three new species of Aneumastus D.G. Mann & Stickle—A. rosettae Lange-Bertalot & Miho, A. albanicus LangeBertalot & Miho and A. humboldtianus Lange-Bertalot & Miho (all in Lange-Bertalot 2001). Krammer (1997) provided a description of Encyonema ochridanum Krammer, while in his later monograph on Cymbella C. Agardh, he described the new species Cymbella exigua Krammer from Lake Prespa (Krammer 2002). Metzeltin & Lange-Bertalot (2002) added a new species of Sellaphora Mereschkowsky (S. mutatoides LangeBertalot & Metzeltin). The most comprehensive work on both lakes is Levkov et al. (2007), where more than 500 diatom species were identified, including 70 new species. Most samples for this study were collected from Lake Prespa and the eastern part of Lake Ohrid. Later, in a revision of the genus Amphora, Levkov (2009) described 16 new species from both lakes, while more recently Levkov & Williams (2011) described an additional 15 species from nine different genera. Most of the papers noted above considered the recent diatom flora, its diversity, ecology and distribution. More recently, the palaeoecology of the lakes received attention with the first core sediment analysis being carried out for Lake Ohrid by Roelofs & Kilham (1983). The core was mostly dominated by centric diatoms, in particular species of Cyclotella (Kütz.) Bréb. Wagner et al. (2008) and Reed et al. (2010) provide a general overview of the changes in the diatom flora during the last glacial/interglacial cycle. Detailed analyses of the diatom composition of the last glacial/interglacial cycle are provided by Cvetkoska (pers. comm.), with special attention given to Cyclotella ocellata Pant., resulting in the recognition of 23 different morphotypes in the core. 4 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS In summary, a century of diatom research on Lakes Ohrid and Prespa has yielded around 900 different taxonomic entities including species, varieties, unidentified species, and a variety of informal designations (aff., cf.) (Table 1). Some of these names undoubtedly will end up as synonyms (especially those identified as aff., cf.), but others represent new and as yet described species. In future studies, greater attention is required for several pennate genera such as Surirella Turpin, Diploneis (Ehrenb.) Cleve, Caloneis Cleve and Hippodonta Lange-Bert., Metzeltin & Witkowski, all of which have species that exhibit a diverse series of variable morphologies. TABLE 1: Numbers of taxa recorded from both Lake Ohrid and Lake Prespa and their watersheds. Number of Taxa Total 919 Lake Ohrid 789 Lake Prespa 244 Watershed 80 Lake Ohrid (Endemic) 117 Lake Prespa (Endemic) 33 Total endemic 124 Relict species 15 Discussion: Relevance of the Checklist to further Diatom Studies In general, investigations on the diatom flora support three important features of the benthic diatoms from Lake Ohrid: i) ii) iii) High levels of diatom diversity; High levels of diatom endemism; and The presence of relict species (Jurilj 1956a). Later, Levkov et al. (2007) documented a further feature: iv) The presence of a high diversity of species in genera primarily considered to be more diverse in marine, coastal or brackish habitats, such as species from Diploneis, Amphora, Surirella Turpin and Campylodiscus Ehrenb. ex Kütz. A total of 789 taxa were reported for Lake Ohrid of which 117 taxa (14%) are considered to be endemic to the lake and 15 (c. 2%) considering to be relict species, or known previously only from fossil deposits in Romania (Köpecz and Bodos). The number of species recorded for Lake Ohrid continues to increase. In the last 10 years there have been descriptions of at least 100 new species (Lange-Bertalot 2001; Levkov et al. 2007; Levkov & Williams 2011). Benthic diatoms dominate the Lake Ohrid diatom flora while representatives in the plankton are few, dominated by two species complexes: C. fottii and C. ocellata Pant., which also are dominant in the fossil record (Reed et al. 2010). This situation is similar to other large lakes (Stoermer & Edlund 1999). The benthic community is dominated by representatives of the genera Navicula Bory and Nitzschia Hassall (99 and 50 taxa, respectively). DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 5 There remains a certain level of cryptic diversity in Lake Ohrid. For example, several wide-spread species such as Navicula tripunctata Bory have slightly different morphological or numerical features when compared to other European populations. Soudek & Robinson demonstrated that populations of Asterionella formosa have highly divergent isozyme patterns when compared to European and North American populations (Soudek & Robinson 1983) and Cvetkoska (2011) demonstrated large morphological variation in the C. ocellata complex, identifying 22 different morphotypes. Comparison of Lake Ohrid with other large lakes is instructive (Table 2): In Lake Tanganyika 474 diatom taxa from 43 genera have been recorded (Cocquyt et al. 1993), of which only 30 species (c. 8%) are considered as endemic (Cocquyt & Vyverman 1994) with the majority of species apparently “cosmopolitan” or at least with wider distributions than in the lakes in which they were described (c. 70%). However, recent observations of the genera Amphora and Halamphora (Cleve) Levkov (Cocquyt 2003; Levkov 2009) indicate that the diatom flora of Lake Tanganyika is considerably more diverse than previously understood. Both genera are represented by a total of 18 species, of which 13 are considered to be endemic. The 13 endemic species were not observed in other localities in the East African Rift (Lake Malawi, Lake Victoria). It would not be surprising to discover that the number of taxa and especially the number of endemic species will be found to be much higher than it is now. A similar situation is found in Surirella Turpin (Cocquyt & Jahn 2005, 2007) and Navicula hasta sensu Cocquyt (Cocquyt 1998), in which there are at least five different taxa with only one properly described: Navicula cocquytae Levkov & Nakov (in Levkov et al. 2007). TABLE 2: Comparision of numbers of diatom taxa in ancient or large lakes Number of Taxa Number of Endemic Taxa % endemism Lake Ohrid 789 132 16.7 Lake Baikal 450 148 32.9 Lake Tanganyika 474 30 6.3 Lake Hövsgöl 373 1 0.3 Great Laurentian Lakes 1488 0 0 The diatom flora of the ancient Mongolian Lake Khövsgöl (Hövsgöl) is composed of 373 diatom taxa from 67 genera (Edlund et al. 2001, 2006b). According to Edlund et al. (2006b) Lake Khövsgöl has a low level of endemism. However, recent studies have revealed a hitherto unseen diversity in several genera such as Amphora, Didymosphenia M. Schmidt in A. Schmidt et al., Aneumastus D.G. Mann & Stickle and the Navicula reinhardtii complex (Pappas & Stoermer 2003; Levkov 2009; Edlund & Soninkhishig 2009). Further observations are necessary to establish more accurately the proper levels of endemism in Lake Khövsgöl. Lake Baikal is well known for its high level of endemism, including its benthic diatoms (Skvortzow & Meyer 1928; Skabitschewsky 1936; Skvortzow 1937; Williams & Reid 2006a, 2006b). Early in the history of studies on Lake Baikal, Skvortzow (1937) listed over 450 taxa with 148 taxa (c. 33%) endemic. A similar figure was provided by the initial survey of recent studies (Flower & Williams 1999). Several species complexes are presently characterized by a large diversity of forms (Mann 1999; Levkov 2009). According to Edlund et al. (2006a) and Williams & Reid (2006b), at least one third of the diatom flora is composed of endemic taxa. In Skvortzow (1937) 452 taxa are listed, and 148 taxa (~33%) could be considered as endemic. Stoermer et al. (1999) reported 1488 diatom taxa for the Laurentian Great Lakes from 105 genera but there is no accurate record of their endemism. Recent observations on species of Amphora suggest that there are many undiscovered species (Levkov 2009). However, the levels of endemism are probably low due to the short period of existence of these lakes. In general, large, ancient lakes harbor levels of endemism in diatom taxa of around one third the total flora. Examination of specimens with better tools, such as electron microscopy, usually reveals significant 6 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS differences and identifies numerous new characters as well as taxa. Meaningful comparison between lakes will be possible once these endemic taxa are studied in detail. Methods, Abbreviations and Sources This checklist is a comprehensive work based on all available published data and will provide the basis for future diatom research on both of these diverse and ancient lakes. The checklist is organized using the classification in Round et al. (1990). While that classification is now a little out of date, and as new work on diatom classification will result in a number of major changes at higher taxonomic levels, it is prudent to adopt an older reasonably efficient system to organize the names even though we accept that it is far from a natural diatom classification. Abbreviations used are explained thus: O P O/P W * # = = = = = = Lake Ohrid only Lake Prespa only Both Lake Ohrid and Lake Prespa Watershed of Lake Ohrid or Prespa Known only from Lake Ohrid or Prespa Relict species Author abbreviations mostly follow the International Plant Names Index (IPNI, http://www.ipni.org/ipni/ authorsearchpage.do). Results Class COSCINODISCOPHYCEAE Round & R.M. Crawford 1990 Order: Melosirales Crawford 1990 Family: Melosiraceae Kütz. 1844 MELOSIRA C. Agardh 1824 1. Melosira moniliformis (O.F. Müll.) C. Agardh 1824 Miho & Lange-Bertalot 2004 O 2. Melosira temperei Pant. 1892 Reed et al. 2010 O 3. Melosira varians C.Agardh 1827 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 1: 1–3; Petrovska & Stojanov 2007; Pavlov 2010 fig. 1 O 4. Melosira sp. sensu Petkov 1910 Petkov 1910 O 5. Melosira sp. sensu Djordjevic 1905 Djordjevic 1905 O Order: Orthoseirales R.M. Crawford 1990 Family: Orthoseiraceae R.M. Crawford 1990 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 7 ORTHOSEIRA Thwaites 1849 6. Orthoseira dendroteres (Ehrenb.) Round, R.M. Crawford & D.G. Mann 1990 Levkov et al. 2007 figs 9: 12–15 W 7. Orthoseira roseana (Rabenh.) O’Meara 1876 O/W [Melosira roseana Rabenh.] Schröder 1921; Jurilj 1954; Kungulovski et al. 1987; Levkov et al. 2007 fig. 9: 11; Petrovska & Stojanov 2007 Order: Thalassiosirales Glezer & Makarova 1986 Family: Thallassiosiraceae M. Lebour 1930 THALASSIOSIRA Cleve 1873 8. Conticribra weissflogii (Grunow) K.Stachura-Suchoples & D.M.Williams 2009 O [Thalassiosira weissflogii (Grunow) G.A. Fryxell et Hasle] Miho & Lange-Bertalot 2004 Family: Stephanodisceae Glezer & Makarova 1986 CYCLOSTEPHANOS Round 1987 9. Cyclostephanos dubius (Fricke) Round 1982 O [Stephanodiscus dubius (Fricke) Hust.] Jurilj 1954; Petrovska & Stojanov 2007 10. Cyclostephanos sp. sensu Reed et al. 2010 Reed et al. 2010 O CYCLOTELLA (Kütz.) Bréb. 1838 11. Cyclotella bifacialis Jurilj 1954* Jurilj 1954; Levkov et al. 2007 figs 9: 1–6; Petrovska & Stojanov 2007 O 12. Cyclotella cyclopunctata Håk. 1990 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 13. Cyclotella distinguenda Hust. 1928 Miho & Lange-Bertalot 2004 O 14. Cyclotella fottii Hust. 1942* O/P [Cyclotella hustedtii Jurilj] Fott 1933; Huber-Pestalozzi 1942, fig. 492; Hustedt 1945 fig. 38: 1; Jurilj 1954 fig. 3; Jurilj 1956a; Kozarov 1954, 1957, 1959, 1960a, 1961, 1972, 1974; Jerkovic 1969 figs 4: 1–7, 5: 8–11; Jerkovic 1976 figs 1, 2; Allen & Ocevski 1976; Čado 1971, 1974, 1977, 1978; Ocevski & Allen 1978; Mitić 1985, 1987, 1990, 1992, 1993, 1998a,b,c; Krammer & Lange-Bertalot 1991a figs 47: 3a, b; Simonsen 1987 figs 462: 1–4; Ocevski 1992; Noveska 1994; Miho 1998a fig. 2: 1; Mitić & Patceva 1999b, 2004; Mitić et al. 1997, 2000a,b; Patceva 2001; Kusel-Fetzmann & Losert 2001; Miho & Lange-Bertalot 2003, 2004; Cullaj et al. 2005; Shumka & Miho 2005; Matzinger et al. 2006a, 2006b; 2007, Levkov et al. 2003a figs 1: 11, 12; Levkov et al. 2007 figs 5:1, 6: 1–3, 7: 1–11, 8: 1–5; Patceva & Mitić 2008; Petrovska & Stojanov 2007; Petrova et al. 2008; Reed et al. 2010 figs 1–12; Pavlov 2010 figs 1–3, 2: 1–11 15. Cyclotella fottii f. II sensu Kozarov 1960b1 Kozarov 1960b 8 • Phytotaxa 45 © 2012 Magnolia Press - LEVKOV & WILLIAMS 16. Cyclotella glabriuscula (Grunow) Håk. 1998 Miho & Lange-Bertalot 2004 O 17. Cyclotella juriljii nom.nud sensu Kocev et al. 2010 Kocev et al. 2010, Naumoski & Mitreski 2010 P 18. Cyclotella kuetzingiana Thwaites 1848 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 19. Cyclotella meneghiniana Kütz. 1844 Fott 1933; Hustedt 1945; Jurilj 1954; Kozarov 1957, 1959, 1960a; Miho 1998a; Miho & LangeBertalot 2004; Petrovska & Stojanov 2007, Pavlov 2010: figs 3: 3–5 O 20. Cyclotella ocellata Pant. 1901 Fott 1933; Hustedt 1945; Jurilj 1954; Kozarov 1957, 1959, 1960b, 1961, 1972; Čado 1977; Ocevski & Allen 1978; Kungulovski et al. 1987; Mitić et al. 1997; Miho 1998; Miho & LangeBertalot 2003, 2004; Levkov et al. 2007 figs 3: 1–11, 4: 1–12, 5: 2–6, 6: 4–9; Petrovska & Stojanov 2007; Wagner et al. 2008 fig. 5A, B; Petrova et al. 2008; Wagner et al. 2009 fig. 5a, b, Kocev et al. 2010; Naumoski & Mitreski 2010; Reed et al. 2010 figs 13–18; Zdraveski et al. 2010 fig 9; Pavlov 2010 figs 2: 12–44, 3: 3: 7, 8, 11–28 O/P 21. Cyclotella striata (Kütz.) Grunow 1880 Petrovska & Stojanov 2007 O 22. Cyclotella thienemanni var. minuscula Jurilj 1954* Jurilj 1954 fig. 6d; Petrovska & Stojanov 2007 23. Cyclotella verrucosa Jerković & Čado 1974* Jerković & Čado 1974 O 24. Cyclotella sp. sensu Levkov et al. 2007 Levkov et al. 2007 fig. 8: 6 P 25. Cyclotella sp. sensu Pavlov 2010 Pavlov 2010, figs 3: 6–11 O O DISCOSTELLA Houk & Klee 2004 26. Discostella stelligera (Cleve ex Grunow) Houk & Klee 2004 O [Cyclotella stelligera Cleve ex Grunow] Fott 1933; Hustedt 1945; Jurilj 1954; Kozarov 1957; Miho 1998; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 27. Discostella pseudosteligera (Hust.) Houk & Klee 2004 O [Cyclotella pseudosteligera Hust.] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 28. Discostella sp. sensu Levkov et al. 2007 Levkov et al. 2007 figs 9: 9, 10 O PUNCTICULATA Håk. 2002 29. Puncticulata comta (Ehrenb.) Håk. 2002 O [Cyclotella comta (Ehrenb.) Kütz.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 1. The valves depicted by Kozarov (1960b: figs 3, 4) belong to post-initial cells of the species named Cyclotella ocellata Pant. in Levkov et al. (2007: figs 3: 1–11). The Cyclotella ocellata species complex occurs in both Lakes Ohrid and Prespa and requires revision as some populations differ in their dimensions and morphological features when compared to type specimens. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 9 30. Puncticulata praetermissa (J.W.G. Lund) Håk. 2002 O [Cyclotella praetermissa J.W.G. Lund] Miho & Lange-Bertalot 2004 31. Puncticulata radiosa (Grunow) Håk. 2002 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 32. Puncticulata thienemanni (Jurilj) Levkov 2007* O [Cyclotella thienemanni Jurilj] Jurilj 1954 figs 6a, b, c; Levkov et al. 2007 figs 10: 1–7; Petrovska & Stojanov 2007, Pavlov 2010 figs 3: 29–33 STEPHANODISCUS Ehrenb. 1846 33. Stephanodiscus alpinus Hust. 1942 Wagner et al. 2008 fig. 5A O 34. Stephanodiscus cf. alpinus Hust. 1942 Levkov et al. 2007 figs 11: 1, 2 P 35. Stephanodiscus galileensis Håk. & A. Ehrlich 1987 Levkov et al. 2007 figs 11: 5, 6; Reed et al. 2010 P 36. Stephanodiscus hantzschii Grunow 1880 Hustedt 1945; Jurilj 1954; Ocevski & Allen 1978; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 37. Stephanodiscus minutulus (Kütz.) Cleve & J.D. Möller 1878 O [Stephanodiscus astraea var. minutula Grunow] Fott 1933; Hustedt 1945; Jurilj 1954 figs 8a, b, c, d; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 38. Stephanodiscus neoastrea Håk. & B. Hickel 1986 O [Stephanodiscus astrea var. intermedius Fricke] Fott 1933; Hustedt 1945; Jurilj 1954 fig. 9; Kozarov 1957, 1959, 1960a; Ocevski & Allen 1978; Mitić 1993; Patceva 2001; Petrovska & Stojanov 2007 39. Stephanodiscus parvus Stoermer & Håk. 1984 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 40. Stephanodiscus rotula (Kütz.) Hendey 1964 O/P [Stephanodiscus astraea (Ehrenb.) Grunow] Hustedt 1945; Jurilj 1954; Kozarov 1959; Allen & Ocevski 1976; Ocevski & Allen 1978; Levkov et al. 2007 figs 11: 3, 4; Petrovska & Stojanov 2007 41. Stephanodiscus parvus Stoermer & Håk. 1984 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 42. Stephanodiscus transsylvanicus Pant. 1892# Levkov et al. 2007 fig. 11: 7 P 43. Stephanodiscus sp. sensu Levkov et al. 2007 Levkov et al. 2007 figs 10: 8–14 P 44. Stephanodiscus sp. sensu Pavlov 2010 Pavlov 2010: fig. 2 O 10 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Order: Paraliales R.M. Crawford 1990 Family: Paraliaceae R.M. Crawford 1988 ELLERBECKIA R.M. Crawford 1988 45. Ellerbeckia arenaria (Moore ex Ralfs) R.M. Crawford 1988 O [Melosira arenaria Moore ex Ralfs] Petkov 1910; Hustedt 1945; Jurilj 1954; Čado 1977; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 2: 1–5; Petrovska & Stojanov 2007 Order: Aulacoseirales R.M. Crawford 1990 Family: Aulacoseiraceae R.M. Crawford 1990 AULACOSEIRA Thwaites 1848 46. Aulacoseira ambigua (Grunow) Simonsen 1979 O/P [Melosira ambigua (Grunow) O. Müll.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 1: 7, 9, 10; Petrovska & Stojanov 2007 47. Aulacoseira distans (Ehrenb.) Simonsen 1979 O [Melosira distans (Ehrenb.) Kütz.] Fott 1933; Hustedt 1945; Jurilj 1954; Kozarov 1957; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 48. Aulacoseira granulata (Ehrenb.) Simonsen 1979 O/P [Melosira granulata (Ehrenb.) Ralfs] Schröder 1921; Fott 1933; Hustedt 1945; Jurilj 1954 figs 1a, b, c; Kozarov 1957; Mitić 1998a; Mitić & Patceva 1999b; Mitić et al. 2000b; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 1: 11–14; Petrovska & Stojanov 2007; Reed et al. 2010 49. Aulacoseira granulata var. angustissima (O. Müll.) Simonsen 1979 O [Melosira granulata var. angustissima O. Müll.] Jurilj 1954; Miho 1998; Miho & Lange-Bertalot 2004 50. Aulacoseira italica (Ehrenb.) Simonsen 1979 O [Melosira italica (Ehrenb.) Kütz.] Fott 1933; Hustedt 1945; Jurilj 1954; Kozarov 1957; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 51. Aulacoseira italica var. tenuissima (Grunow) Simonsen 1979 Miho & Lange-Bertalot 2004 O 52. Aulacoseira islandica (O. Müll.) Simonsen 1979 Levkov et al. 2007 fig. 1: 6 P 53. Aulacoseira muzzanensis (F. Meister) Krammer 19912 Levkov et al. 2007 figs 1: 4, 5, 8 P 54. Aulacoseira subarctica (O.Müll.) Haw. 1990 O [Melosira italica var. subarctica O. Müll.] Čado 1977 55. Aulacoseira spec. sensu Reed et al. 2010 Reed et al. 2010 2. O The valves of Aulacoseira muzzanensis (F. Meister) Krammer depicted in Levkov et al. (2007) are probably of an as yet described species. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 11 Order: Coscinodiscales Round & R.M. Crawford 1990 Family: Hemidiscaceae Hendey 1937 ACTINOCYCLUS Ehrenb. 1837 56. Actinocyclus normanii (W. Greg. Ex Grev.) Hust. 1957 Miho & Lange-Bertalot 2004 O 57. Actinocyclus spec. sensu Levkov et al. 2007 Levkov et al. 2007 figs 11: 8, 9 P Class MEDIOPHYCEAE (A.P. Jousé & A.I. Proshkina-Lavrenko) Medlin & Kaczmarska 2004 Order: Triceratiales Round & R.M. Crawford 1990 Family: Plagiogrammaceae De Toni 1890 DIMEREGRAMMA J. Ralfs 1861 58. Dimeregramma minor (W. Greg.) Ralfs 18613 Miho & Lange-Bertalot 2004 P Order: Toxariales Round 1990 Family: Toxariaceae Round 1900 TOXARIUM J.W. Bailey 1854 59. Toxarium undulatum J.W. Bailey 18544 O [Synedra (Toxarium) undulata (J.W. Bailey) W.Sm.] Miho & Lange-Bertalot 2004 Class BACILLARIOPHYCEAE Haeckel 1878 Order: Fragilariales Silva 1962 Family: Fragilariaceae Greville 1833 ASTERIONELLA Hassall 1850 60. Asterionella formosa Hassall 1850 P [Asterionella gracillima (Hantzsch) Heib.] Forti 1931; Fott 1933; Jurilj 1954 fig. 13a; Kozarov 1959, 1960b, 1961, 1972; Allen & Ocevski 1976; Mitić 1998b; Mitić et al. 2000b; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 21: 8; Petrovska & Stojanov 2007; Pavlov 2010 figs 8: 9, 10 CENTRONELLA Max Voigt 1902 61. Centronella reicheltii Max Voigt 1902 Noveska 1994; Mitić 1998a,b,c; Mitić & Patceva 1999b; Patceva 2001 O DIATOMA Bory 1824 62. Diatoma angusticostata D.M. Williams & Levkov 2006* P [Diatoma. ‘angusticostata’ nom. nud. Lange-Bert., Rumrich & Hofmann 1991] 3. This species is widely distributed in marine habitats and is therefore unlikely to be found in oligotrophic Lake Ohrid. 4. This is a marine species and it is unlikely to be found in oligotrophic Lake Ohrid. 12 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS [Diatoma ‘densicostata’ nom. nud. Lange-Bert., Rumrich & Hofmann 1991] Levkov & Williams 2006 figs 1–4, 15–25; Levkov et al. 2007 figs 13: 1–16, 14: 1–5, 15: 1–7 63. Diatoma densicostata Levkov & D.M. Williams 2006* Levkov & Williams 2006 figs 5–7, 26–32; Levkov et al. 2007 figs 16: 1–16, 17: 1–8 O 64. Diatoma ehrenbergii Kütz. 1844 O [Diatoma vulgaris var. grandis (W.Sm) Grunow] [Diatoma vulgaris var. ehrenbergii (Kütz.) Grunow] Jurilj 1954 fig. 10d; Čado 1971, 1977, 1978; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 12: 1–8; Petrovska & Stojanov 2007 65. D. elongatum f. actinastroides (W. Krieg.) Proschkina-Lavrenko 1950 Petrovska & Stojanov 2007 O 66. Diatoma hyemalis (Roth) Heib. 1863 Jurilj 1954; Petrovska & Stojanov 2007 O 67. Diatoma mesodon (Ehrenb.) Kütz. 1844 O [Diatoma hiemale var. mesodon (Ehrenberg) Grunow] Petkov 1910; Hustedt 1945; Jurilj 1954 fig. 10f; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 18: 3, 4; Petrovska & Stojanov 2007 68. Diatoma moniliforme Kütz. 1833 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 18: 5 O 69. Diatoma ochridana Lange-Bert. & Rumrich 1991* Lange-Bertalot et al. 1991; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 70. Diatoma tenuis C. Agardh 1812 Mitić 1998a,c; Mitić & Patceva 1999b; Mitić et al. 2000b; Patceva 2001; Miho & LangeBertalot 2004; Levkov et al. 2007 figs 18: 3, 4 O 71. Diatoma vulgaris Bory 18245 O 6 [Diatoma vulgare var. brevis Grunow ] [Diatoma vulgare var. capitulata Grunow] [Diatoma vulgare var. lineare Grunow] [Diatoma vulgare var. productum Grunow] Petkov 1910; Hustedt 1945; Jurilj 1954 fig. 10a, b, c, d,e; Kozarov 1959; Čado 1965, 1971, 1977, 1978; Kungulovski et al. 1987; Noveska 1994; Miho 1998; Shumka & Miho 2005; Mitić 1998a,b,c; Mitić & Patceva 1999b; Mitić et al. 2000b; Patceva 2001; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 72. Diatoma spec. sensu Levkov & D.M.Williams 2006 Levkov & Williams 2006 figs 8–12 O FRAGILARIA Lyngb. 1819 73. Fragilaria capucina Desm. 1830 Hustedt 1945; Jurilj 1954; Miho 1998 fig. 1: 6; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 20: 13–16; Petrovska & Stojanov 2007; Reed et al. 2010; Pavlov 2010 figs 8: 19–22 O/P 5. Diatoma vulgaris sensu stricto has not been observed in Lake Ohrid. Most of the records of this species occurring in Lake Ohrid refer to other species of Diatoma, e.g. Diatoma ohridana, D. densicostata or Diatoma spec. sensu Levkov & Williams (2006). 6. This taxon has been misidentified and is described as a new species by Levkov & Williams as Odontidium minuta (Levkov & Williams 2011). Typical specimens of D. vulgaris var. brevis have yet to be found in Lake Ohrid. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 13 74. Fragilaria capucina var. austriaca (Grunow) Lange-Bert. 1980 Pavlov 2010 figs 8: 1–8 O 75. Fragilaria capucina var. mesolepta (Rabenh.) Rabenh. 1864 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 O 76. Fragilaria rumpens (Kütz.) G. W. F. Carlson 1913 O [Synedra rumpens Kütz.] [Fragilaria capucina var. rumpens (Kütz.) Lange-Bert. nom. invalid] [Fragilaria capucina subsp. rumpens (Kütz.) Lange-Bert.] Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 77. Fragilaria capucina var. lanceolata Grunow 1881 Hustedt 1945; Jurilj 1954 O 78. Fragilaria capucina var. perminuta (Grunow) Lange-Bert. 1991 Miho & Lange-Bertalot 2004; Shumka & Miho 2005 O 79. Fragilaria capucina var. vaucheriae (Kütz.) Lange-Bert. 1980 O [Synedra vaucheriae Kütz.] [Fragilaria vaucheriae (Kütz.) J.B. Petersen] [Fragilaria intermedia (Grunow) Grunow] Hustedt 1945 figs 40: 7–11; Jurilj 1954 fig. 15a–i; Čado 1971; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 80. Fragilaria capucina Desm. var. 1 sensu Levkov et al. 2007 Levkov et al. 2007 fig. 20: 8 W 81. Fragilaria capucina Desm. var. 2 sensu Levkov et al. 2007 Levkov et al. 2007 figs 20: 9, 10 P 82. Fragilaria cf. capucina Desm. 1830 sensu Pavlov 2010 Pavlov 2010 figs 8: 23, 24 O 83. Fragilaria crotonensis Kitton 1869 Jurilj 1954; Kungulovski et al. 1987; Noveska 1994; Mitić et al. 1997; Miho 1998; Patceva 2001; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 O 84. Fragilaria inflata (Heiden) Hust. 1931 Petrovska & Stojanov 2007 O 85. Fragilaria javanica Hust. 1938 Petrovska & Stojanov 2007 O 86. Fragilaria micra Levkov & D.M. Williams 2011* Levkov & D.M. Williams 2011: figs 46–63 O 87. Fragilaria rumpens (Kütz.) G. W. F. Carlson 1913 O [Synedra rumpens Kütz.] [Fragilaria capucina var. rumpens (Kütz.) Lange-Bert. nom. invalid] [Fragilaria capucina subsp. rumpens (Kütz.) Lange-Bert.] Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 88. Fragilaria sp. sensu Pavlov 2010 Pavlov 2010 fig. 18 O FRAGILARIFORMA D.M. Williams & Round 1988 89. Fragilariforma bicapitata (A. Mayer) D.M. Williams & Round 1988 O [Fragilaria bicapitata Mayer] 14 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Petrovska & Stojanov 2007 90. Fragilariforma virescens (Ralfs) D.M. Williams & Round 1988 O [Fragilaria virescens Ralfs] Kungulovski et al. 1987; Mitić 1998b, c; Mitić & Patceva 1999b; Patceva 2001; Petrovska & Stojanov 2007 91. Fragilariaforma virescens var. capitata (Østrup) Hartley 1996 O [Fragilaria virescens var. capitata Østrup] Petrovska & Stojanov 2007 HANNAEA R.M. Patrick 1966 92. Hannaea arcus (Ehrenb.) R.M. Patrick 1966 O/P [Ceratoneis arcus (Ehrenb.) Kütz.] [Fragilaria arcus (Ehrenb.) Cleve] Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Mitić 1998a,b,c; Mitić & Patceva 1999b; Levkov 2001; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 21: 1–5; Petrovska & Stojanov 2007 MARTYANA Round 1990 93. Martyana martyi (Herib.) Round 1990 O/P [Fragilaria leptostauron var. martyi (Hérib.) Lange-Bert.] [Opephora martyi Herib.] Hustedt 1945; Čado 1971; Miho & Lange-Bertalot 2004 MERIDION C. Agardh 1824 94. Meridion circulare (Grev.) C.Agardh 1831 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Mitić 1998b; Patceva 2001; Miho & LangeBertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 fig. 21: 9; Petrovska & Stojanov 2007 95. Meridion circulare var. constrictum (Ralfs) Van Heurck 1880 Levkov et al. 2007 fig. 21: 10; Petrovska & Stojanov 2007 O/P W ODONTIDIUM Kütz. 1844 96. Odontidium minuta Levkov & D.M. Williams 2011* O [Diatoma vulgaris var. brevis Grunow sensu Levkov et al. 2007] Levkov et al. 2007 figs 18: 6–11; Levkov & D.M. Williams 2011, figs 1–9, 25–30 OPEPHORA P. Pettit 1888 97. Opephora olsenii M. Møller Miho 1998 O PSEUDOSTAUROSIRA (Grunow) D.M.Williams & Round 1987 98. Pseudostaurosira brevistriata (Grunow) D.M.Williams & Round 1987 O/P [Fragilaria brevistriata Grunow ] Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 19: 7–9; Reed et al. 2010; Pavlov 2010 figs 7: 54–63 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 15 99. Pseudostaurosira robusta (Fusey) D.M. Williams & Round 1987 Levkov et al. 2007 fig. 19: 11 P STAUROSIRA (Ehrenb.) D.M.Williams & Round 1987 100. Staurosira construens (Ehrenb.) D.M. Williams & Round 1987 O/P [Fragilaria construens (Ehrenberg) Grunow] Hustedt 1945; Jurilj 1954 fig. 12d, e; Kozarov 1959; Čado 1971; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 fig. 19: 12; Petrovska & Stojanov 2007 101. Staurosira construens var. binodis (Ehrenb.) P. Ham. 1992 Hustedt 1945; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 19: 10; Petrovska & Stojanov 2007 102. Staurosira construens var. triundulata (Reichelt) Bukht. 1995 O/P O [Fragilaria construens var. triundulata Reichelt] Petrovska & Stojanov 2007 103. Staurosira construens var. venter (Ehrenb.) P. Ham. 1992 O [Fragilaria construens f. venter (Ehrenb.) Hust.] [Fragilaria construens var. venter (Ehrenb.) Grunow] [Staurosira construens f. venter (Ehrenb.) Bukht.] Hustedt 1945; Jurilj 1954 fig. 12f, g; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Reed et al. 2010 104. Staurosira spec. 1 sensu Levkov et al. 2007 Levkov et al. 2007 figs 19: 1–6 P 105. Staurosira spec. 2 sensu Levkov et al. 2007 Levkov et al. 2007 figs 19: 13, 14; P 106. Staurosira spec. 1 sensu Pavlov 2010 Pavlov 2010 figs 7: 35–42 P 107. Staurosira spec. 2 sensu Pavlov 2010 Pavlov 2010 figs 7: 43–53 P STAUROSIRELLA D.M.Williams & Round 1987 108. Staurosirella lata Levkov, D.M. Williams & Cvetkoska 2011* O [Staurosirella leptostauron (Ehrenb.) D.M. Williams & Round sensu Levkov et. al 2007] Levkov et al. 2007 fig. 19: 26; Levkov & D.M. Williams 2011 figs 31–39; 42–45 109. Staurosirella leptostauron (Ehrenb.) D.M. Williams & Round 19877 O [Fragilaria leptostauron (Ehrenb.) Hust.] Jurilj 1954 fig. 12c; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 19: 26; Petrovska & Stojanov 2007 110. Staurosirella leptostauron var. dubia (Grunow) Bukht. 1995 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 111. Staurosirella pinnata (Ehrenb.) D.M.Williams & Round 1987 O O/P [Fragilaria pinnata Ehrenb.] 7. This taxon has been misidentified and is described as a new species in Levkov & Williams as S. lata Levkov, D.M. Williams & Cvetkoska (Levkov & Williams 2011). Typical specimens of S. leptostauron have yet to be found in Lake Ohrid. 16 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Hustedt 1945; Jurilj 1954 fig. 12h, i, j; Kungulovski et al. 1987; Levkov et al. 2007 figs 19: 15– 20; Miho & Lange-Bertalot 2004, Kocev et al. 2010; Naumoski & Mitreski 2010; Reed et al. 2010; Pavlov 2010 figs 7: 1–7. 112. Staurosirella pinnata var. lancettula (Schumann) Siver & P.Ham. 2005 O [Fragilaria pinnata var. lancetulla Hust.] Jurilj 1954 fig. 12k, l 113. Staurosirella pulchella Levkov & D.M. Williams 2011* Levkov & D.M. Williams 2011 figs 10–17, 40, 41 O 114. Staurosirella rhomboides (Grunow) E. Morales & Manoylov 2006 Petrovska & Stojanov 2007 O 115. Staurosirella spec. sensu Levkov et al. 2007 Levkov et al. 2007 figs 19: 21–23 P 116. Staurosirella sp.1 (elongate) sensu Pavlov 2010 Pavlov 2010 figs 7: 8–22 O 117. Staurosirella sp. 2 (elliptic) sensu Pavlov 2010 Pavlov 2010 figs 7: 23–27 O 118. Staurosirella sp. 3 (coarse) sensu Pavlov 2010 Pavlov 2010 figs 7: 28–34 O SYNEDRELLA Round & Maidana 2001 119. Synedrella parasitica (W. Sm.) Round & Maidana 2001 O/P [Fragilaria parasitica (W.Sm.) Grunow] Petrovska & Stojanov 2007; Levkov et al. 2007 fig. 20: 12; Pavlov 2010 figs 8: 11–17 120. Synedrella subconstricta (Grunow) Round & Maidana 2001 P [Fragilaria parasitica var. subconstricta Grunow] Levkov et al. 2007 fig. 20: 12 SYNEDRA Ehrenb. 1830 121. Synedra crystalina (C. Agardh) Kütz. 18448 Petrovska & Stojanov 2007 O 122. Synedra longissima var. vulgaris Meister 1912 Petrovska & Stojanov 2007 O 123. Synedra sp. sensu Pavlov 2010 Pavlov 2010 figs 8: 7, 8 O ULNARIA Compère 2001 124. Ulnaria acus (Kütz.) Aboal 2003 O/P [Fragilaria ulna var. acus (Kütz.) Lange-Bert.] [Synedra acus Kütz.] Hustedt 1945; Jurilj 1954; Mitić et al. 1997; Miho 1998; Mitić 1998a,b,c; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 20: 3; Petrovska & Stojanov 2007 125. Ulnaria biceps (Kütz.) Compère 2001 P [Fragilaria biceps (Kütz.) Lange-Bert.] 8. This species is usually found in brackish to marine waters and it is unlikely to be found in oligotrophic Lake Ohrid. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 17 [Synedra ulna var. biceps (Kütz.) Kirchner in Cohn] Hustedt 1945; Jurilj 1954 fig. 14a, b; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 fig. 20: 2 126. Ulnaria capitata (Ehrenb.) Compère 2001 O [Synedra capitata Ehrenb.] [Synedra dilatata Brèb.] Hustedt 1945; Jurilj 1954 fig. 14d; Kungulovski et al. 1987; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 20: 4; Petrovska & Stojanov 2007 127. Ulnaria danica (Kütz.) Compère & Bukht. 2006 O [Synedra danica Kutz.] [Synedra ulna var. danica (Kütz.) Grunow in Van Heurck] [Fragilaria ulna f. danica (Kütz.) Hust.] [Fragilaria danica (Kütz.) Lange-Bert.] [Fragilaria ulna f. danica (Kütz.) Hust.] Jurilj 1954 fig. 14d; Petrovska & Stojanov 2007 128. Ulnaria oxyrhynchus (Kütz.) Aboal 2003 O [Synedra oxyrhynchus Kütz.] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 129. Ulnaria ulna (Nitzsch) Compère 2001 O [Fragilaria ulna (Nitzsch) Lange-Bert.] [Synedra ulna (Nitzsch) Ehrenb.] Hustedt 1945; Jurilj 1954 fig. 13b, c, d, e; Kozarov 1959; 1960a; Kungulovski et al. 1987; Noveska 1994; Miho 1998; Mitić 1998a,b,c; Mitić & Patceva 1999b; Mitić et al. 2000b; Patceva 2001; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 fig. 20: 5; Petrovska & Stojanov 2007 130. Ulnaria ulna var. aequalis (Kütz.) Aboal 2003 O [Synedra ulna var. aequalis Hust.] Jurilj 1954; Levkov et al. 2007 fig. 20: 1; Petrovska & Stojanov 2007 131. Ulnaria amphirhynchus (Ehrenb.) Compère & Bukht. 2006 O [Ulnaria ulna var amphirhynchus (Ehrenb.) Aboal] [Synedra ulna var. amphirhynchus (Ehrenb.) Grunow] Petrovska & Stojanov 2007 132. Ulnaria ulna var spatulifera (Grunow) Aboal 2003 O [Synedra ulna var. spatulifera Grunow] Petrovska & Stojanov 2007 133. Ulnaria ulna (Nitzsch) Compère var. 1. sensu Levkov et al. 2007 Levkov et al. 2007 figs 20: 6, 7 O/W TABULARIA (Kütz.) D.M. Williams & Round 1986 134. Tabularia fasciculata (C. Agardh) D.M. Williams & Round 1986 O [Fragilaria fasciculata (C.Agardh) Lange-Bert.] Miho & Lange-Bertalot 2004 Family: Tabellariaceae Kütz. 1844 TABELLARIA Ehrenb. 1840 135. Tabellaria fenestrata (Lyngb.) Kütz. 1844 18 • Phytotaxa 45 © 2012 Magnolia Press P LEVKOV & WILLIAMS [Tabellaria fenestrata var. intermedia Grunow] Jurilj 1954; Kungulovski et al. 1987; Mitić 1998b, 1998c; Mitić & Patceva 1999b; Levkov et al. 2007 fig. 21: 7; Petrovska & Stojanov 2007 136. Tabellaria flocculosa (Roth) Kütz. 1844 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 21: 6 P Order: Eunotiales Silva 1962 Family: Eunotiaceae Kütz. 1844 EUNOTIA Ehrenb. 1837 137. Eunotia arcus Ehrenb. 1837 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 138. Eunotia bilunaris (Ehrenb.) Mills 1934 Levkov 2010 W 139. Eunotia flexuosa (Bréb.) Kütz. 1849 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 140. Eunotia formica Ehrenb. 1843 Kungulovski et al. 1987 O 141. Eunotia glacialis F. Meister 1912 Kungulovski et al. 1987; Petrovska & Stojanov 2007 O 142. Eunotia gracilis (Ehrenb.) Rabenh. 1864 Petrovska & Stojanov 2007 O 143. Eunotia minor (Kütz.) Grunow 1881 W [Eunotia pectinalis var. minor (Kütz.) Rabenh.] Levkov et al. 2007 fig. 21: 14; Petrovska & Stojanov 2007 144. Eunotia incisa W. Greg. 1854 Levkov et al. 2007 fig. 21: 15 145. Eunotia mucophila (Lange-Bert. & Nörpel-Schempp) Lange-Bert. 2007 W O [Eunotia bilunaris var. mucophila Lange-Bert., Nörpel-Schempp & Alles] Miho & Lange-Bertalot 2004 146. Eunotia parallela Ehrenb. 1843 Petrovska & Stojanov 2007 O 147. Eunotia pectinalis (Dillwyn) Rabenh. 1864 Petrovska & Stojanov 2007 148. Eunotia praerupta Ehrenb. 1843 Levkov et al. 2007 fig. 21: 16 O W 149. Eunotia rhomboidea Hust. 1950 Petrovska & Stojanov 2007 O 150. Eunotia sudetica O. Müll. 1898 Levkov et al. 2007 figs 21: 12, 13 W 151. Eunotia valida Hust. 1930 Petrovska & Stojanov 2007 O DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 19 PERONIA Bréb. & Arn. ex F. Kitton 1868 152. Peronia heribaudii Brun & Perag. 1893 Petrovska & Stojanov 2007 O Order: Mastogloiales D.G. Mann Family: Mastogloiaceae Mereschkowsky 1903 MASTOGLOIA Thwaites 1856 153. Mastogloia braunii Grunow 1863 Petrovska & Stojanov 2007 O 154. Mastogloia pumilla (Grunow) Cleve 1895 Petrovska & Stojanov 2007 O 155. Mastogloia cf. pumilla (Grunow) Cleve 1895 Miho & Lange-Bertalot 2004 O 156. Mastogloia smithii Thwaites 1856 Hustedt 1945 O 157. Mastogloia smithii var. amphicephala Grunow 1878 Petrovska & Stojanov 2007 O ANEUMASTUS D.G. Mann & Stickle 1990 158. Aneumastus albanicus Lange-Bert. & Miho 2001* Lange-Bertalot 2001; Miho & Lange-Bertalot 2003 figs 2, 3; Miho & Lange-Bertalot 2004; Kupe & Miho 2006; Levkov et al. 2007 figs 73: 8, 74: 1–9, 78: 2, 3; Pavlov 2010 fig. 18: 1 159. Aneumastus apiculatus (Østrup) Lange-Bert. 2001 Miho & Lange-Bertalot 2004 160. Aneumastus humboldtianus Lange-Bert. & Miho 2001* Lange-Bertalot 2001; Miho & Lange-Bertalot 2003 fig 4; Miho & Lange-Bertalot 2004; Kupe & Miho 2006; Levkov et al. 2007 fig. 74: 10 161. Aneumastus juriljii Levkov & Metzeltin 2007* O O O O [Navicula tuscula var. media Jurilj] [Aneumastus tusculus var. media Jurilj sensu Miho & Lange-Bertalot 2004 nom. invalid] Jurilj 1954 fig. 43c; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 71: 1, 79: 12–14; Petrovska & Stojanov 2007 162. Aneumastus laetus (Mayer) Lange-Bert. 20019 O [Aneumastus balcanicus Lange-Bert. nom. invalid] Lange-Bertalot 2001; Miho & Lange-Bertalot 2004 163. Aneumastus macedonicus Levkov 2007* Levkov et al. 2007 figs 70: 1–10, 71: 1–4, 72: 1–6; Pavlov 2010 figs 18: 2–6 164. Aneumastus maculosus (Donkin) Lange-Bert. 2001 O/P O [Navicula maculosa Donkin] Petrovska & Stojanov 2007 9. “Laetus”-stages were observed in different species of Aneumastus; they represent post-initial cells. The valves from Lake Ohrid depicted in Lange-Bertalot (2001: figs 121: 1–7, 122: 1–3) probably belong to either A. metzeltinii or A. rosettae. In the discussion of plate 121, Lange-Bertalot (2001: 480) introduces the name “Aneumastus balcanicus spec. nov”, but does not sufficiently describe the species. It is unclear if Lange-Bertalot (2001) identified the “laetus”-stages from Lake Ohrid as A. balcanicus nom. invalid. 20 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 165. Aneumastus metzeltinii Levkov 2007* Levkov et al. 2007 figs 73: 1–7 O 166. Aneumastus minor (Hust.) Lange-Bert. 200110 O [Navicula tuscula var. minor Hust.] Hustedt 1945; Kungulovski et al. 1987; Lange-Bertalot 2001; Miho & Lange-Bertalot 2001 167. Aneumastus minor var. densestriata Levkov & Krstic 2007* Levkov et al. 2007 figs 80: 1–16; Pavlov 2010 figs 18: 10, 11 O/P 168. Aneumastus ochridanus Levkov & Metzeltin 2007* Levkov et al. 2007 figs 76: 1–10; Pavlov 2010 figs 18: 7–9 O 169. Aneumastus pseudapiculatus Levkov & Metzeltin 2007* Levkov et al. 2007 figs 76: 12, 77: 1–12, 78: 1, 4–6 P 170. Aneumastus subapiculatus Levkov & Nakov 2007* Levkov et al. 2007 figs 75: 4–11 O 171. Aneumastus rhombicus Levkov & Metzeltin 2007* Levkov et al. 2007 figs 79: 1–9 O 172. Aneumastus rosettae Lange-Bert. & Miho 2001* Lange-Bertalot 2001; Miho & Lange-Bertalot 2003 fig. 1; Miho & Lange-Bertalot 2004; Miho & Kupe 2006; Levkov et al. 2007 figs 75: 1–3 O 173. Aneumastus rostratus (Hust.) Lange-Bert. 200111 Petrovska & Stojanov 2007 O 174. Aneumastus stroesei (Østrup) D.G. Mann & Stickle 1990 O [Navicula pseudotuscula Hust.] Hustedt 1945; Petrovska & Stojanov 2007 175. Aneumastus cf. stroesei (Østrup) D.G. Mann 1990 Levkov et al. 2007 figs 76: 11, 81: 1–5 O 176. Aneumastus tusculus (Ehrenb.) D.G. Mann & Stickle 199012 O [Navicula tuscula Ehrenb.] Hust. 1945; Jurilj 1954 fig. 43b; Miho 1998 fig. 2: 5; Petrovska & Stojanov 2007, Miho & Lange-Bertalot 2004 177. Aneumastus sp. (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 79: 10, 11 O Order: Cymbellales D. G. Mann 1990 Family: Rhoicospheniaceae Chen & Zhu 1983 RHOICOSPHENIA Grunow 1860 178. Rhoicosphenia abbreviata (C. Agardh) Lange-Bert. 198013 O [Rhoicosphaenia curvata (Kütz.) Grunow] 10. A population comparable to A. minor in Lake Ohrid was described by Levkov et al. (2007) as A. minor var. densestriata Levkov & Krstic. Typical A. minor has yet to be found in Lake Ohrid. 11. This species has yet to be found in Lake Ohrid; it was probably confused with A. metzeltinii. 12. Aneumastus tusculus sensu Lange-Bertalot (2001: figs 114: 1–2) is described as A. macedonicus in Levkov et al. (2007); valves of A. tusculus sensu stricto have yet to be found in Lake Ohrid. 13. After revision of the genus Rhoicosphenia from Lake Ohrid, it was concluded that R. abbreviata was not present. There are two species of Rhoicosphenia found in Lake Ohrid that differ from R. abbreviata: R. macedonica and R. tenuis. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 21 Hustedt 1945; Jurilj 1954 fig. 22b; Čado 1977 fig. 2: 3; Kungulovski et al. 1987; Miho 1998; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 30: 18–31; Petrovska & Stojanov 2007 179. Rhoicosphenia linearis Østrup 190114 Petrovska & Stojanov 2007 O 180. Rhoicosphenia cf. linearis Østrup 1910 Miho & Lange-Bertalot 2004 O 181. Rhoicosphenia macedonica Levkov & Krstic 2007* Levkov et al. 2007 figs 30: 1–17; Levkov et al. 2010 figs 9a–t, 10a–h, 11a–g O 182. Rhoicosphenia tenuis Levkov & Nakov 2008* Levkov & Nakov 2008 figs 1–11, 30–49; Levkov et al. 2010 figs 12a–x, 13a–g, 14a–g O Family: Anomoeoneidaceae D.G. Mann 1990 ANOMOEONEIS Pfitzer 1871 183. Anomoeneis sphaerophora (Kütz.) Pfitzer 1871 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 118: 2; Petrovska & Stojanov 2007 O Family: Cymbellaceae Grev. 1833 CYMBELLA C. Agardh 1830 184. Cymbella affiniformis Krammer 2002 Levkov et al. 2007 figs 133: 18–22 P 185. Cymbella affinis Kütz. 184415 O [Cymbella tumidula Grunow] Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 Čado 1971, 1977; Miho 1998; Miho & Lange-Bertalot 2004; 186. Cymbella aspera (Ehrenb.) Cleve 1894 O [Cymbella gastroides Kütz.] Beck 1904; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 187. Cymbella cymbiformis C. Agardh 1830 O [Cymbella maculata Kütz.] [Cymbella cistula var. maculata (Kütz.) Van Heurck] Beck 1904; Petkov 1910; Hustedt 1945; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 137: 4–6 188. Cymbella excisa Kütz. 1844 Levkov 2010 189. Cymbella excisa var. procera Krammer 2002 Levkov et al. 2007 figs 134: 1–11, 135: 1 190. Cymbella excisiformis Krammer 2002 Levkov et al. 2007 figs 134: 12–14 W O P 14. This species was misidentified as R. macedonica. 15. After Krammer’s (2002) revision of this species complex, it appears that Cymbella affinis is not present in the lakes. However, several similar species have been observed and described. 22 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 191. Cymbella exigua Krammer 2002* Krammer 2002 figs 10: 19–24; Levkov et al. 2007 figs 133: 7–14 P O/W 192. Cymbella helvetica Kütz. 184416 Hustedt 1945; Jurilj 1954; Miho 1998 fig. 2: 8; Krammer 2002 figs 187: 1–5; Miho & LangeBertalot 2004; Petrovska & Stojanov 2007 193. Cymbella aff. helvetica Kütz. sensu Miho & Lange-Bertalot 2003 Miho & Lange-Bertalot 2003 O 194. Cymbella helvetica var. balatonis (Grunow) Ehrenb. 1894 Petrovska & Stojanov 2007 O 195. Cymbella helvetica var. curta Cleve 1894 Petrovska & Stojanov 2007 O 196. Cymbella aff. helvetica Kütz. (nov. f?) sensu Miho & Lange-Bertalot Miho & Lange-Bertalot 2004 O 197. Cymbella hustedtii Krasske 1923 Miho 1998 fig. 2: 11 P 198. Cymbella laevis Naegeli 1849 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 199. Cymbella lanceolata (Ehrenb.) Kirchner 1878 Hustedt 1945; Jurilj 1954 fig. 62b; Čado 1971, 1977 fig. 1: 1; Kungulovski et al. 1987; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 139: 1; Petrovska & Stojanov 2007 O 200. Cymbella lancettula (Krammer) Krammer 2002 O [Cymbella tumidula var. lancettula Krammer] Petrovska & Stojanov 2007 201. Cymbella lange-bertalotii Krammer 2002 [Cymbella sp sensu Levkov et al. 2003a figs 2: 6–10] Levkov et al. 2003a figs 2: 6–10; Levkov et al. 2007 figs 142: 1–10 O 202. Cymbella melovskii Levkov & Krstic 2007* Levkov et al. 2007 figs 134: 15–22, 135: 1–3 O 203. Cymbella modica Levkov & Nakov 2007* Levkov et al. 2007 figs 136: 1–11 O 204. Cymbella neocistula Krammer 2002 O [Cymbella cistula (Ehrenb.) Kirchner] Hustedt 1945; Jurilj 1954; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 138: 1–9; Petrovska & Stojanov 2007 205. Cymbella neoleptoceros Krammer 2002 W [Cymbella leptoceros (Ehrenb.) Kütz.] Hustedt 1945; Jurilj 1954 fig. 58a; Kozarov 1960a; Miho & Lange-Bertalot 2004 206. Cymbella neoleptoceroides Levkov 2007* Levkov et al. 2007 figs 137: 7–10 O 207. Cymbella ohridana Levkov & Krstic 2007* Levkov et al. 2007 figs 139: 2–5, 140: 1–8 O 16. A species similar to Cymbella helvetica have been observed in Lake Ohrid, but was later described as Cymbella ohridana by Levkov et al. (2007). Valves of several taxa (e.g. Cymbella aff. helvetica and Cymbella helvetica var. balatonis) recorded for Lake Ohrid are C. ohridana. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 23 208. Cymbella parva (W. Sm.) Cleve 1878 Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 O 209. Cymbella perexigua Levkov & Krstic 2007 Levkov et al. 2007 figs 133: 1–6, 135: 6, 7 O 210. Cymbella perparva Krammer 2002 Levkov et al. 2007 figs 133: 15–17, 135: 5 O 211. Cymbella tumida (Bréb.) Van Heurck 1880 O/W Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 137: 1–3; Petrovska & Stojanov 2007 ENCYONEMA Kütz. 1833 212. Encyonema caespitosum Kütz. 1849 O/P [Cymbella caespitosa (Kütz.) Brun] Petkov 1910; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 131: 17–22; Petrovska & Stojanov 2007 213. Encyonema caespitosum var. latum Van Heurck 1882 Petkov 1910 214. Encyonema elginense (Krammer) D.G. Mann 1990 Levkov et al. 2007 fig. 130: 9 O O 215. Encyonema lacustris (C. Agardh) F.W. Mills 1934 O [Cymbella lacustris (C. Agardh) Cleve] Jurilj 1954 fig. 64d; Petrovska & Stojanov 2007 216. Encyonema lange-bertalotii Krammer 1997 Levkov et al. 2007 figs 132: 1–7 W 217. Encyonema macedonicum Levkov, Metzeltin & Krstic 2006* [Encyonema sp. sensu Levkov et al. 2003a figs 2: 2–5] Levkov et al. 2003a figs 2: 2–5; Levkov et al. 2006b figs 1–24, Levkov et al. 2007 figs 128: 1–5 O 218. Encyonema minutum (Hilse) D.G. Mann 1990 O [Cymbella minuta Hilse ex Rabenh.] Hustedt 1945; Jurilj 1954; Čado 1971, 1977; Kungulovski et al. 1987; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 132: 15–17 219. Encyonema neogracile Krammer Levkov et al. 2007 fig. 132: 8 W 220. Encyonema ochridanum Krammer 1997* Krammer 1997 figs 31: 3–10; Levkov et al. 2007 figs 132: 9–14 O 221. Encyonema perpusilum (A. Cleve) D.G. Mann 1990 O [Cymbella perpusila A. Cleve] Hustedt 1945; Jurilj 1954 222. Encyonema prostratum (Berk.) Kütz. 1844 O/P [Cymbella prostrata (Berk.) Cleve] Forti 1931; Fott 1933; Hustedt 1945; Jurilj 1954 fig. 60c, d; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 130: 1–3; Petrovska & Stojanov 2007 223. Encyonema pseudoceaspitosum Levkov & Krstic 2007* Levkov et al. 2007 figs 131: 1–16 24 • Phytotaxa 45 © 2012 Magnolia Press O LEVKOV & WILLIAMS 224. Encyonema silesiacum (Bleisch) D.G. Mann 1990* O [Cymbella silesiaca Bleisch] Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 130: 4–8; Petrovska & Stojanov 2007 225. Encyonema turgidum (W. Greg.) Grunow 1875 O [Cymbella turgida W. Greg.] Hustedt 1945; Jurilj 1954; Miho 1998; Petrovska & Stojanov 2007 226. Encyonema ventricosum (Kütz.) Grunow 1875 O [Cymbella ventricosum Kütz.] Beck 1904; Hustedt 1945; Jurilj 1954 fig. 61a; Miho 1998; Petrovska & Stojanov 2007 227. Encyonema sp. sensu Kozarov 1960 Kozarov 1960a O PLACONEIS Mereschk. 1903 228. Placoneis anglica (Ralfs) E.J. Cox 2003 O [Navicula anglica Ralfs] Hustedt 1945 figs 42: 17–19; Jurilj 1954 fig. 38d; Petrovska & Stojanov 2007 229. Placoneis balcanica (Hust.) Lange-Bert., Metzeltin & Levkov 2005* O/P [Navicula balcanica Hust.] Hustedt 1945 figs 40: 12–15; Jurilj 1954 fig. 41c; Krammer & Lange-Bertalot 1986 fig. 47: 21; Levkov et al. 2003b figs 1: 12, 13; Levkov et al. 2007 figs 96: 11–18, 93: 2–4, Reed et al. 2010 230. Placoneis clementis (Grunow) E.J. Cox 198717 O [Navicula clementis Grunow] Hustedt 1945; Jurilj 1954 fig. 40d; Miho 1998; Miho & Lange-Bertalot 2004 231. Placoneis clementoides (Hust.) E.J. Cox 1987 Miho 1998 fig. 2: 2; Miho & Lange-Bertalot 2004; Miho & Lange-Bertalot 2006 fig. 64; Levkov et al. 2003b fig. 1: 17; Levkov et al. 2007 figs 89: 8–12 P 232. Placoneis elginensis (W. Greg.) E.J. Cox 1987 P [Navicula dicephala (Ehrenb.) W.Sm.] Hustedt 1945; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 89: 1; Petrovska & Stojanov 2007 233. Placoneis gastrum (Ehrenb.) Mereshk. 1903 O [Navicula gastrum (Ehrenb.) Kütz.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2003b figs 1: 9–10; Levkov et al. 2007 figs 91: 1–4; Petrovska & Stojanov 2007 234. Placoneis gastrum var. ? sensu Miho & Lange-Bert. Miho & Lange-Bertalot 2003 O 235. Placoneis ignorata (Schim.) Lange-Bert. 2000 Levkov et al. 2007 figs 89: 3, 4 W 236. Placoneis juriljii Miho & Lange-Bert. 2006 O [Placoneis sp. sensu Levkov et al. 2003b fig. 1: 8] 17. Navicula clementis Grunow sensu Jurilj (1954, fig. 40d) was described by Miho & Lange-Bertalot (2006) as Placoneis juriljii Miho & Lange-Bert. (2006: 306) Valves belonging to P. clementis sensu stricto have not been observed in Lake Ohrid. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 25 Miho & Lange-Bertalot 2006, figs 27–35; Kupe & Miho 2006; Levkov et al. 2003b fig. 1: 8; Levkov et al. 2007 figs 92: 1–3; Levkov & Williams 2011, fig. 88 237. Placoneis latiuscula (Grunow) Levkov 2007 P [Navicula placentula f. latiuscula F. Meister] Hustedt 1945; Jurilj 1954 fig. 39c; Čado 1978, Levkov et al. 2003b figs 1: 1–5 238. Placoneis macedonica Levkov & Metzeltin 2007* Levkov et al. 2007 figs 98: 1–8, 99: 20–23 O 239. Placoneis maculata (Hust.) Levkov 2007# O/P [Navicula placentula var. maculata Hust.] Hustedt 1945 fig. 40: 16; Jurilj 1954; Čado 1965, 1971, 1974, 1978; Levkov et al. 2007 figs 94: 1–4, 240. Placoneis minor (Grunow) Lange-Bert. 2005 Miho & Lange-Bertalot 2006 figs 41–45; Petrovska & Stojanov 2007 O 241. Placoneis neoexigua Lange-Bert. & Miho 2006 P [Placoneis exigua (W. Greg.) Mereschk.] [Navicula exigua (W. Greg.) Grunow] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Miho & Lange-Bertalot 2006, figs 1– 11, 20–26; Kupe & Miho 2006; Levkov et al. 2007; Petrovska & Stojanov 2007 242. Placoneis ohridana Levkov & Metzeltin 2007* Levkov et al. 2007 figs 97: 1–7 O 243. Placoneis paraelginesis Lange-Bertalot 2000 Miho & Lange-Bertalot 2006, fig. 69 O 244. Placoneis placentula (Ehrenb.) Mereschk. 1903 O/P/W [Navicula placentula (Ehrenb.) Kütz.] Hustedt 1945; Jurilj 1954 fig. 39a, b; Čado 1978; Miho 1998 fig 2: 3; Miho & Lange-Bertalot 2004; Levkov et al. 2003b figs 1: 14–16; Levkov et al. 2007 figs 99: 18, 19; Petrovska & Stojanov 2007 245. Placoneis placentula var. jenisseyensis (Grunow) Bukht. 1995 O [Navicula placentula f. jenissyensis Grunow] Hustedt 1945; Jurilj 1954 fig. 39d; Čado 1978, Levkov et al. 2003a fig. 1: 7 246. Placoneis placentula f. rostrata (A. Mayer) Bukht. 1995 O [Navicula placentula f. rostrata Hust.] Hustedt 1945 fig. 42: 12; Jurilj 1954; Čado 1978; Levkov et al. 2003b fig. 1: 6 247. Placoneis porifera (Hust.) E.J. Cox 198718 Miho & Lange-Bertalot 2004; Miho & Lange-Bertalot 2006 figs 52–62 O 248. Placoneis prespanensis Levkov, Krstic & Nakov 2007* Levkov et al. 2007 figs 99: 1–17, 100: 1–7 P 249. Placoneis pseudabundans Levkov 2011* Levkov & Williams 2011 figs 92–95 P 250. Placoneis pseudanglica (Lange-Bert.) E.J. Cox 1987 Miho & Lange-Bertalot 2006, figs 12–19; Levkov et al. 2007 figs 89: 20–28 O 251. Placoneis signata (Hust.) Mayama 1998 O [Navicula gastrum var. signata Hust.] 18. Krammer & Lange-Bertalot (1986) treated Navicula balcanica Hust. as a synonym of N. porifera Hust. Later, Lange-Bertalot et al. (in Metzeltin et al. 2005) considered Navicula balcanica and N. porifera as a separate species and transfered N. balcanica to Placoneis. 26 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Jurilj 1954 fig. 41a; Miho & Lange-Bertalot 2004; Miho & Lange-Bertalot 2006, figs 36–40; Levkov et al. 2003b fig. 1: 11; Petrovska & Stojanov 2007 252. Placoneis signatoides Metzeltin & Levkov 2007* Levkov et al. 2007 figs 90: 2–9 O 253. Placoneis significans Lange-Bert. 2005 O/P [Placoneis exigua var. signata Hustedt sensu Miho & Lange-Bertalot 2004 nom. invalid] Miho & Lange-Bertalot 2004; Miho & Lange-Bertalot 2006, figs 46–51; Levkov et al. 2007 figs 90: 10, 91: 5–10 254. Placoneis subgastriformis (Hust.) E.J. Cox 2003* O [Navicula subgastriformis Hust.] Hustedt 1945 figs 42: 13, 14; Jurilj 1954 fig. 41a; Simonsen 1987 figs 511: 1–4; Levkov et al. 2007 figs 90: 2–9; Petrovska & Stojanov 2007 255. Placoneis subelegans Levkov 2011* Levkov & Williams 2011, figs 97–113 O 256. Placoneis symmetrica (Hust.) Lange-Bert. 2005 O [Placoneis constans var. symetrica Hust. senu Miho & Lange-Bertalot 2004 nom. invalid] Miho & Lange-Bertalot 2004 257. Placoneis tumidula Levkov 2007* Levkov et al. 2007 figs 91: 11–15, 92: 4–10, 93: 1 O 258. Placoneis undulata (Østrup) Lange-Bert. 2000 P [Navicula dicephala var. undulata Østrup] Hustedt 1945; Levkov et al. 2007 259. Placoneis nov. spec. sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 260. Placoneis sp. sensu Levkov et al. 2007 Levkov et al. 2007 fig. 89: 2 O CYMBOPLEURA (Krammer) Krammer 2003 261. Cymbopleura amphycephala (Naegeli) Krammer 2003 О [Cymbella amphycephala Naegeli] Miho & Lange-Bertalot 2004 262. Cymbopleura anglica (Lagerst.) Krammer 2003 Levkov et al. 2007 figs 152: 1–14 P 263. Cymbopleura austriaca (Grunow) Krammer 2003 O [Cymbella austriaca Grunow] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 264. Cymbopleura cuspidata (Kütz.) Krammer 2003 O/P [Cymbella cuspidata Kütz.] Hustedt 1945; Jurilj 1954 fig. 60a, b; Kungulovski et al. 1987; Miho 1998; Miho & LangeBertalot 2004; Levkov et al. 2007 figs 151: 1–8; Petrovska & Stojanov 2007 265. Cymbopleura inequalis (Ehrenb.) Krammer 2003 O [Cymbella ehrenbergii Kütz.] Hustedt 1945; Jurilj 1954 figs 58h, c, 59a, b; Kungulovski et al. 1987; Miho 1998 fig. 2: 10; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 149: 5; Petrovska & Stojanov 2007; Pavlov 2010 fig. 20: 2 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 27 266. Cymbopleura juriljii Levkov & Metzeltin 2007* Levkov et al. 2007 figs 147: 1–4; Levkov & Williams 2011, fig. 106; Pavlov 2010 fig. 20: 1 267. Cymbopleura lata (Grunow) Krammer 2003 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 148: 1–7 O O/P 268. Cymbopleura macedonica Levkov & Krstic 2007* Levkov et al. 2007 figs 150: 1–4 O 269. Cymbopleura naviculiformis (Auersw.) Krammer 2003 O [Cymbella naviculiformis (Auersw.) Cleve] Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987, Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 270. Cymbopleura pertruncata Levkov & Metzeltin 2007* Levkov et al. 2007 figs 145: 1–5, 146: 1–4 O 271. Cymbopleura petrovskae Levkov & Krstic 2007* Levkov et al. 2007 figs 153: 1–11 O/P 272. Cymbopleura subaequalis (Grunow) Krammer 2003 Levkov et al. 2007 fig. 151: 9 P 273. Cymbopleura subcuspidata (Krammer) Krammer 2003 O [Cymbella heteropleura var. minor Cleve] Petrovska & Stojanov 2007 274. Cymbopleura tumida Levkov, Krstic & Nakov 2011* Levkov & Williams 2011 figs 115–121, 126–130 O DECUSSATA Lange-Bert. 2000 275. Decussata hexagona (Torka) Lange-Bert. 2000 Levkov et al. 2007 figs 118: 4–6 W DELICATA Krammer 2003 276. Delicata delicatula (Kütz.) Krammer 2003 O [Cymbella delicatula Kütz.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 ENCYONOPSIS Krammer 1997 277. Encyonopsis microcephala (Grunow) Krammer 1997 O/P [Cymbella microcephala Grunow] Hustedt 1945 figs 42: 63–67; Jurilj 1954; Čado 1971, 1977, 1978; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 132: 18–20 278. Encyonopsis minuta Krammer & E. Reichardt 1997 Miho & Lange-Bertalot 2004 O 279. Encyonopsis spicula (Hust.) Krammer 1997 O [Cymbella spicula Hust.] Petrovska & Stojanov 2007 280. Encyonopsis subminuta Krammer & E. Reichardt 1997 Miho & Lange-Bertalot 2004; Shumka & Miho 2005 28 • Phytotaxa 45 © 2012 Magnolia Press O LEVKOV & WILLIAMS Family: Gomphonemataceae Kütz. 1844 GOMPHONEIS Cleve 1894 281. Gomphoneis herculeanum (Ehrenb.) Cleve 1894 Miho & Lange-Bertalot 2004 O 282. Gomphoneis prespanensis Levkov, Metzeltin & Krstic 2007* Levkov et al. 2007 figs 174: 1–6, 178: 10, 179: 1–7, 180: 1–6 O/P 283. Gomphoneis ohridana Levkov 2007* Levkov et al. 2007 figs 178: 1–9 O 284. Gomphoneis transsilvanica (Pant.) Krammer 198519 O [Gomphonema transsilvanicum Pant.] [Gomphonema transsylvanicum (Pant.) Hust. sensu Jurilj 1954] Hustedt 1945 fig. 38: 7; Jurilj 1954 fig. 69b; Čado 1965, 1965, 1971, 1974, 1977 fig. 1: 2, 1978; Ocevski et al. 1978; Krammer 1982; Krammer & Lange-Bertalot 1986 figs 166: 12, 13; Levkov et al. 2003a figs 1, 2; Levkov et al. 2003b figs 1: 24–29; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 GOMPHONEMA Ehrenb. 1832 285. Gomphonema acuminatum Ehrenb. 1836 Beck 1904; Jurilj 1954 fig. 65a, b; Hustedt 1945; Kungulovski et al. 1987; Miho & LangeBertalot 2004; Levkov et al. 2007 figs 166: 1–3; Petrovska & Stojanov 2007 O 286. Gomphonema acuminatum var. trigonocephalum (Ehr.) Grunow 1880 Jurilj 1954; Petrovska & Stojanov 2007 O 287. Gomphonema affine Kütz. 1844 Miho & Lange-Bertalot 2004 O 288. Gomphonema angustatum (Kütz.) Rabenh. 1864 Hustedt 1945; Jurilj 1954; Kozarov 1959, 1961; Čado 1977; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 289. Gomphonema angustatum var. linearis Hust. 1930 Jurilj 1954 fig. 66b O 290. Gomphonema augur Ehrenb. 1840 Petrovska & Stojanov 2007 O 291. Gomphonema balcanicum Levkov & Krstic 2007* Levkov et al. 2007 figs 169: 11–23, 170: 1–8 O 292. Gomphonema bohemicum A. Reichelt & Fricke 1902 Miho & Lange-Bertalot 2004 O 293. Gomphonema brebissonii Kütz. 1849 O [Gomphonema acuminatum var. brebissonii (Kütz.) Grunow] Petrovska & Stojanov 2007 294. Gomphonema capitatum Ehrenb. 1838 O [Gomphonema constrictum var. capitata Ehrenb.] 19. This species has been frequently recorded in Lake Ohrid in the earlier diatom studies. However, it was discovered that two species different from G. transsilvanica are present. Differences between specimens of type material and Lake Ohrid were recorded by Krammer (1982). DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 29 Hustedt 1945 figs 42: 45, 46; Jurilj 1954; Kungulovski et al. 1987; Levkov et al. 2007 figs 165: 8–15; Petrovska & Stojanov 2007 295. Gomphonema constrictum Ehrenb. 1832 Beck 1904; Petkov 1910; Hustedt 1945; Jurilj 1954; Kozarov 1960a; Petrovska & Stojanov 2007 O 296. Gomphonema coronatum Ehrenb. 1840 O [Gomphonema acuminatum var. coronatum (Ehrenb.) W. Smith] Jurilj 1954 fig. 65c; Čado 1977 fig. 2: 4; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 297. Gomphonema clavatum Ehrenb. 1832 Miho & Lange-Bertalot 2004; Shumka & Miho 2005 O 298. Gomphonema curtum Hust. 1945 O [Gomphonema minutum f. curtum (Hust.) Lange-Bert.] Hustedt 1945 figs 42: 37–43; Jurilj 1954; Simonsen 1987 figs 513: 8–13; Krammer & LangeBertalot 1991a; Miho & Lange-Bertalot 2004 299. Gomphonema densistriatum Levkov 2011* Levkov & Williams 2011 figs 210–221, 253–258 O 300. Gomphonema dichotomum Kütz. 1834 O [Gomphonema intricatum var. dichotomum (Kütz.) Grunow] Hustedt 1945; Jurilj 1954 fig. 67a, b; Kozarov 1959 301. Gomphonema elegans var. quadripunctata Skv. & A. Meyer 1928 Jurilj 1954 fig. 69a; Petrovska & Stojanov 2007 O 302. Gomphonema exilisimum (Grunow) Lange-Bert. & E. Reichardt 1996 Miho & Lange-Bertalot 2004 O/W 303. Gomphonema fonticolum (Hust.) Levkov & Krstic 2007* O [Gomphonema olivacium var. fonticola Hust.] Hustedt 1945 figs 40: 19–22; Jurilj 1954; Simonsen 1987 figs 512: 12–18; Levkov et al. 2007 figs 173: 10–20; Levkov & Williams 2011 figs 222–231 304. Gomphonema gracile Ehrenb. 1838 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 166: 4–7 O/P 305. Gomphonema hebridense W. Greg. 1854 Miho & Lange-Bertalot 2004 O 306. Gomphonema intricatum Kütz. 1844 Hustedt 1945; Jurilj 1954 fig. 66d, e; Čado 1977; Petrovska & Stojanov 2007 O 307. Gomphonema insigne W. Greg. 1856 Miho & Lange-Bertalot 2004 O 308. Gomphonema irroratum Hust. 1945* Hustedt 1945 figs 42: 47–49; Jurilj 1954; Simonsen 1987 figs 513: 14–18; Miho & LangeBertalot 2004; Levkov et al. 2007 figs 166: 12, 13; Petrovska & Stojanov 2007 O 309. Gomphonema italicum Kütz. 1844 Levkov et al. 2007 figs 165: 8–15 P 310. Gomphonema (cf.) lacus-vulcanii E. Reichardt & Lange-Bert. 1997 Miho & Lange-Bertalot 2004 O 311. Gomphonema lagenula Kütz. 1844 O [Gomphonema parvulum var. lagenula (Kütz.) Frenguelli] Levkov et al. 2007 figs 166: 20–22; Petrovska & Stojanov 2007 30 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 312. Gomphonema lateripunctatum E. Reichard & Lange-Bert. 1991 Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 172: 4–7 O/W 313. Gomphonema linearoides Levkov 2011* Levkov & Williams 2011 figs 199–209, 246–250 O/W 314. Gomphonema longiceps var. subclavatum Grunow 1878 Jurilj 1954 fig. 66c; Čado 1977 fig. 2: 5. Petrovska & Stojanov 2007 O 315. Gomphonema longiceps var. subclavatum f. gracilis Hust. 1930 Petrovska & Stojanov 2007 O 316. Gomphonema macedonicum Hust. 1945* Hustedt 1945 figs 42: 44, Simonsen 1987 figs 512: 10, 11 O/P 317. Gomphonema micropus Kütz. 1844 O/W [Gomphonema parvulum var. micropus (Kütz.) Grunow] Jurilj 1954 fig. 65e; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 166: 14–16 318. Gomphonema mihoii Levkov 2011* Levkov & Williams 2011 figs 140–148, 172–177 O 319. Gomphonema minutum (C.Agardh) C.Agardh 1831 O/P [Gomphonema tenellum Kütz.] Hustedt 1945 figs 42: 57–59; Jurilj 1954 fig. 68b; Miho 1998 fig. 1: 5; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 169: 32–35; Petrovska & Stojanov 2007 320. Gomphonema minutum f. lemanense Lange-Bert. & E. Reichardt Levkov et al. 2007 figs 169: 24–31 P 321. Gomphonema minutiforme Lange-Bert. & E. Reichardt 1993 Krammer & Lange-Bertalot 1991a figs 81: 20–23; Lange-Bertalot 1993 figs 83: 16–20; Petrovska & Stojanov 2007 O 322. Gomphonema occultum E. Reichardt & Lange-Bert. 1991 Levkov 2010 W 323. Gomphonema olivaceum (Hornem.) Bréb. 1838 Beck 1904; Hustedt 1945; Jurilj 1954 fig. 68d, e; Čado 1971; Čado 1977 fig. 2: 2; Kungulovski et al. 1987; Miho 1998 fig. 2: 9; Miho & Lange-Bertalot 2003, 2004; Levkov et al. 2003b fig. 1: 32; Shumka & Miho 2005; Levkov et al. 2007 figs 173: 1–8; Petrovska & Stojanov 2007 O/P 324. Gomphonema olivaceum var. capitata Jurilj. 194820 Jurilj 1954 fig. 68f; Petrovska & Stojanov 2007 O/P 325. Gomphonema olivaceum var. staurophorum Pant. 1892 Levkov et al. 2007 fig. 173: 9 O 326. Gomphonema olivaceum (Hornemann) Bréb. var. ? sensu Čado Čado 1977 figs 2: 6, 7 O 327. G.omphonema olivaceolacuum (Lange-Bert. & E. Reichardt) Lange-Bert. & E. Reichardt 2004 O/P [Gomphonema olivaceum var. olivaceolacuum Lange-Bert. & E. Reichardt] Miho & Lange-Bertalot 2004; Levkov et al. 2003b figs 30, 31; Levkov et al. 2007 figs 174: 7– 13, 175: 1–6 20. According to the ultrastructural features, such as presence of stigma in the central area and striae composed of C-like areolae (Levkov unpubl. data), this taxon does not belong in the G. olivaceum complex. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 31 328. Gomphonema parvulum (Kütz.) Kütz. 1849 Hustedt 1945; Jurilj 1954 fig. 65d; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 O 329. Gomphonema perolivaceoides Levkov 2007* Levkov et al. 2007 figs 177: 1–21 O/P 330. Gomphonema perolivaceolacuum Levkov 2011* Levkov & Williams 2011 figs 185–198, 241–245 O/P 331. Gomphonema pratense Lange-Bert. 1999 Levkov et al. 2007 figs 167: 1–6, 168: 1–5 O 332. Gomphonema productum (Grunow) Lange-Bert. & E. Reichardt 1993 O [Gomphonema angustatum var. productum Grunow] Čado 1977 fig. 2: 1; Petrovska & Stojanov 2007 333. Gomphonema pseudotenellum Lange-Bert. 1985 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 169: 1–10 O 334. Gomphonema pumilum (Grunow) E. Reichardt & Lange-Bert. 1991 O [Gomphonema intricatum var. pumilum Grunow] Hustedt 1945; Jurilj 1954 fig. 67c, d, e, f; Čado 1965, 1971; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 166: 23–25; Petrovska & Stojanov 2007; Reed et al. 2010 335. Gomphonema pumilum var. elegans E. Reichardt & Lange-Bert. 1997 Miho & Lange-Bertalot 2004 O 336. Gomphonema sancti-naumii Metzeltin & Levkov 2007* Levkov et al. 2007 figs 171: 1–15 O 337. Gomphonema sarcophagus W. Greg. 1856 O [Gomphonema angustatum var. sarcophagus (W. Greg.) Grunow] Jurilj 1954 fig. 66a; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 166: 11 338. Gomphonema subaequale Levkov 2011* Levkov & Williams 2011 figs 149–160, 178–184 O 339. Gomphonema subclavatum (Grunow) Grunow 1884 Levkov et al. 2007 figs 172: 1–3 P 340. Gomphonema subolivaceum Levkov & Nakov 2007* Levkov et al. 2007 figs 176: 1–15, Levkov & Williams 2011 figs 213–221 O 341. Gomphonema tergestinum Fricke 1902 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004 O/W 342. Gomphonema truncatum Ehrenb. 1832 Miho 1998 fig. 2: 12; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 O 343. Gomphonema vibrio Ehrenb. 1843 O [Gomphonema intricatum var. vibrio (Ehrenb.) Cleve] Jurilj 1954 fig. 68a; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 344. Gomphonema spec. sensu Jurilj 1954 Jurilj 1954 fig. 69c 32 • Phytotaxa 45 © 2012 Magnolia Press O LEVKOV & WILLIAMS GOMPHOSPHENIA Lange-Bertatlot 1995 345. Gomphosphenia tenuis Levkov & D.M. Williams 2011* Levkov & Williams 2011, figs 131–139, 161–171 O REIMERIA Kociolek & Stoermer 1987 346. Reimeria fontinalis Levkov in Levkov & Ector 2010 Levkov & Ector 2010, figs 1–13, 42–47, Reed et al. 2010 O 347. Reimeria sinuata (W. Greg.) Kociolek & Stoermer 198721 O [Cymbella sinuata W. Greg.] Hustedt 1945; Jurilj 1954 fig. 61b; Kungulovski et al. 1987; Levkov et al. 2007 figs 132: 21–28; Petrovska & Stojanov 2007 348. Reimeria sinuata f. ovata (Hust.) Hendey 1996 O/P [Cymbella sinuata var. ovata Hust.] Hustedt 1945; Jurilj 1954 fig. 61c; Petrovska & Stojanov 2007 Order: Achnanthales Silva 1962 Family: Achnanthaceae Kütz. 1844 ACHNANTHES Bory 1822 349. Achnanthes biasolettiana var. subatomus Lange-Bert. 1989 Miho & Lange-Bertalot 2004 O 350. Achnanthes brevipes C. Agardh 182422 Jurilj 1954 fig. 22a; Miho & Lange-Bertalot 2004 O 351. Achnanthes coarctata (Bréb. ex W. Sm.) Grunow 1880 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Petrovska & Stojanov 2007 O 352. Achnanthes gibberula Grunow 1880 Petrovska & Stojanov 2007 O 353. Achnanthes gibberula var. interrupta V.S.Poretzky & Anissimova 1933 Petrovska & Stojanov 2007 O 354. Achnanthes holsatica Hust. 1936 Miho & Lange-Bertalot 2004 O 355. Achnanthes jakovljevicii Hust. 1945* Hustedt 1945 figs 39: 13–17; Jurilj 1954; Simonsen 1987 figs 506: 17–22; Petrovska & Stojanov 2007 O 356. Achnanthes lacunarum Hust. 1930 Levkov et al. 2007 figs 23: 32–35; Pavlov 2010 figs 4: 38–44 P 357. Achnanthes minuscula Hust. 1945 Hustedt 1945 figs 39: 8–12; Simonsen 1987 figs 505: 1–19; Krammer & Lange-Bertalot 1991b figs 26: 41–43; Levkov et al. 2007 figs 23: 36–40 O 21. After revision of species of Reimeria in Lake Ohrid, it was demonstrated that R. sinuata sensu stricto is not present and the valves illustrated by Jurilj (1954: fig. 61b) and Levkov et al. (2007: figs 132: 21–28) belong to Reimeria fontinalis described by Levkov (in Levkov & Ector 2010). 22. According to Jurilj (1954: 123, fig. 22a), the valves of this species observed in lake Ohrid are considerably larger than those of other populations (around 150 µm). Such valves were not recorded during recent observations of Jurilj’s original sample, nor in any recent material. Therefore, the identity of the larger valves remains obscure. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 33 358. Achnanthes pusilla Grunow 1880 O [Achnanthes pusilla (Grunow) De Toni] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 359. Achnanthes semiaperta Hust. 1945 Miho & Lange-Bertalot 2004 O 360. Achnanthes sp. sensu Miho 1998 Miho 1998 fig. 2: 16 O KARAYEVIA Round & Bukht. 1998 361. Karayevia clevei (Grunow) Round & Bukht. 1996 O/P [Achnanthes clevei Grunow] Hustedt 1945; Jurilj 1954 fig. 21 a, b; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 22: 1–12, 21–23; Petrovska & Stojanov 2007; Pavlov 2010 figs 10: 9–39 362. Karayevia clevei var. balcanica (Hust.) Levkov 2007* O/P [Achnanthes clevei var. balcanica Hust.] Hustedt 1945 figs 39: 34–37; Jurilj 1954; Simonsen 1987 figs 505: 42–41; Levkov et al. 2007 figs 22: 13–14; Petrovska & Stojanov 2007 363. Karayevia clevei var. balcanica f. rostrata (Hust.) Levkov 2007* P [Achnanthes clevei var. balcanica f. rostrata Hust.] Hustedt 1945 figs 39: 38, 39; Jurilj 1954; Levkov et al. 2007 figs 22: 15–18; Petrovska & Stojanov 2007 364. Karayevia laterostrata (Hust.) Round & Bukht. 1996 Levkov et al. 2007 figs 22: 19, 20 P 365. Karayevia sp. cf. clevei (Grun) Bukht. 1999 Pavlov 2010 figs 9: 1–28 O 366. Karayevia sp. cf. laterostrata (Hust.) Round & Bukht. 1996 Pavlov 2010 figs 10: 1–8 O KOLBESIA Round & Bukht. 1996 367. Kolbesia kolbei (Hust.) Round & Bukht. 1996 O [Achnanthes kolbei Hust.] Hustedt 1945; Petrovska & Stojanov 2007 Family: Achnanthidiaceae D.G. Mann 1990 ACHNANTHIDIUM Kütz. 1844 368. Achnanthidium affine (Kütz.) Czarn. 1994 O [Achnanthes minitissima var. affinis (Grunow) Lange-Bert.] [Achnanthes affinis Grunow] Hustedt 1945; Jurilj 1954; 2007 Čado 1971; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 369. Achnanthidium biasolettianum (Grunow) Lange-Bert. 1999 O [Achnanthes biasolettiana Grunow] Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 370. Achnanthidium catenatum (J. Bílý & Marvan) Lange-Bert. 1999 O [Achnanthes catenata Bílý & Marvan] 34 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Miho & Lange-Bertalot 2004 371. Achnanthidium eutrophilum (Lange-Bert.) Lange-Bert. 1999 O [Achnanthes minutissima var. eutrophila Lange-Bert.] Miho & Lange-Bertalot 2004 372. Achnanthidium exiguum (Grunow) Czarn. 1994 O [Achnanthes exigua Grunow] [Achnanthes exigua var. heterovalva Krasske] Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 373. Achnanthidium exilis (Kütz.) Round & Bukht. 1996 Levkov et al. 2007 fig. 24: 25; Petrovska & Stojanov 2007 O 374. Achnanthidium jackii Rabenh. 1861 Levkov et al. 2007 figs 24: 22–24 O 375. Achnanthidium microcephalum Kütz. 1844 O [Achnanthes microcephala (Kütz.) Grunow] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 376. Achnanthidium minutissimum (Kütz.) Czarn. 1994 O [Achnanthes minutissima Kütz.] Hustedt 1945; Jurilj 1954; Miho 1998; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 24: 13–18, 19–21; Petrovska & Stojanov 2007; Reed et al. 2010; Pavlov 2010 figs 4: 1–11 377. Achnanthidium minutissimum var. gracillima (F. Meister) Bukht. 1995 O [Achnanthes minutissima var. gracillima (Meister) Lange-Bert.] Hustedt 1945; Levkov et al. 2007 figs 24: 7–10 378. Achnanthidium pyrenaicum (Hust.) Kobayasi 1997 Hustedt 1945 figs 40: 1, 2; Levkov et al. 2007 figs 24: 1–6 O 379. Achnanthidium trinode Ralfs 1861 Petrovska & Stojanov 2007 O 380. Achnanthidium sp. sensu Levkov et al. 2007 Levkov et al. 2007 figs 24: 11, 12; Pavlov 2010 figs 4: 14–26 O 381. Achnanthidium sp. 1 sensu Pavlov 2010 Pavlov 2010 figs 4: 27–37 O 382. Achnanthidium sp. 2 sensu Pavlov 2010 Pavlov 2010 figs 4: 45–50 O 383. Achnanthidium sp. 3 sensu Pavlov 2010 Pavlov 2010 figs 4: 51–55 O EUCOCCONEIS Cleve 1895 384. Eucocconeis flexella (Kütz.) Cleve 1895 O [Achnanthes flexella (Kütz.) Cleve] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 385. Eucocconeis lapponica Hust. 1924 O [Achnanthes lapponica (Hust.) Hust.] Hustedt 1945 figs 39: 32, 33; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 35 LEMNICOLA Round & Basson 1997 386. Lemnicola hungarica (Grunow) Round & Basson 1997 O/P [Achnanthes hungarica (Grunow) Grunow] Hustedt 1945; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 23: 22–24; Petrovska & Stojanov 2007 PLANOTHIDIUM Round & Bukht. 1996 387. Planothidium conspicuum (A. Mayer) Aboal 2003 O [Achanthes conspicua A. Mayer] Jurilj 1954 fig. 21j; Petrovska & Stojanov 2007 388. Planothidium dubium (Grunow) Round & Bukht. 1996 Levkov et al. 2007 figs 23: 1–9 O 389. Planothidium ellipticum (Cleve) Round & Bukht 1996 O [Achnanthes lanceolata var. elliptica Cleve] Jurilj 1954 fig. 21h, i; Petrovska & Stojanov 2007 390. Planothidium frequentissimum (Lange-Bert.) Lange-Bert. 1999 O [Achnanthes lanceolata ssp. freqentissima Lange-Bert.] Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 23: 17–20 391. Planothidium lanceolatum (Bréb.) Lange-Bert. 1999 O/P [Achnanthes lanceolata (Bréb.) Grunow] [Planothidium lanceolatum (Bréb.) Round & Bukht.] Hustedt 1945; Jurilj 1954 fig. 21c, d, e, f, g; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 23: 10–15, 21; Petrovska & Stojanov 2007 392. Planothidium linkei (Hust.) Lange-Bert. 1999 O [Achnanthes linkei Hust.] Miho & Lange-Bertalot 2004 393. Planothidium robustius Lange-Bert. 1999 O [Achnanthes lanceolata var. robusta (Hust.) Lange-Bert.] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 394. Planothidium rostratum (Østrup) Lange-Bert. 1999 O/P [Achnanthes lanceolata ssp. rostrata (Oestrup) Lange-Bert.] [Achnanthes lanceolata var. rostrata Hust.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 23: 16; Petrovska & Stojanov 2007 PSAMMONTHIDIUM Bukht. & Round 1996 395. Psammonthidium daonense (Lange-Bert.) Lange-Bert. 1999 Levkov et al. 2007 fig. 23: 27 W 396. Psammonthidium helveticum (Hust.) Bukht. & Round 1996 O/W [Achnanthes helvetica (Hust.) Lange-Bert.] Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 23: 28, 29; Petrovska & Stojanov 2007 Family: Cocconeidaceae Kütz. 1844 COCCONEIS Ehrenb. 1838 397. Cocconeis disculus (Schum.) Cleve 1882 36 • Phytotaxa 45 © 2012 Magnolia Press O/P LEVKOV & WILLIAMS Hustedt 1945; Jurilj 1954 fig. 21c, d, e, f; Kozarov 1959; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 29: 37–41; Petrovska & Stojanov 2007; Reed et al. 2010; Pavlov 2010 figs 6: 1–8 398. Cocconeis diminuta Pant. 1902 O [Cocconeis disculus var. diminuta (Pantocsek) Sheshukova] Hustedt 1945; Jurilj 1954 fig. 20a, b; Kungulovski et al. 1987; Petrovska & Stojanov 2007 399. Cocconeis elliptica sensu Čado nom. invalid Čado 1977 O 400. Cocconeis neothumensis Krammer 1990 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 29: 21–30 O/P 401. Cocconeis pediculus Ehrenb. 1838 Petkov 1910; Hustedt 1945; Jurilj 1954 figs 16, 17a; Kozarov 1960a; Čado 1965, 1971, 1977; Miho 1998; Shumka & Miho 2005; Mitić 1998a,b, 2000b; Mitić & Patceva 1999b; Patceva 2001; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 26: 7, 8; Petrovska & Stojanov 2007; Pavlov 2010 figs 5: 6, 7 O 402. Cocconeis placentula Ehrenb. 1838 Hustedt 1945; Jurilj 1954 fig. 18a, b; Čado 1965; Kungulovski et al. 1987; Mitić 1998a,b; Miho 1998; Mitić & Patceva 1999a, 1999b; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 26: 4–6; Petrovska & Stojanov 2007; Kocev et al. 2010; Naumoski & Mitreski 2010 O/P 403. Cocconeis placentula var. euglypta (Ehrenb.) Cleve 1884 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 404. Cocconeis placentula var. klynorhaphis Geitler 1927 Jurilj 1954 fig. 17b; Petrovska & Stojanov 2007; Pavlov 2010 figs 5: 8, 9 O 405. Cocconeis placentula var. lineata (Ehrenb.) Cleve 1880 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 25: 1–4, 26: 1–3; Petrovska & Stojanov 2007; Pavlov 2010 figs 5: 4, 5, 6: 9–11 O 406. Cocconeis placentula var. rouxii (Hérib. & Brun) Cleve 1895 Petrovska & Stojanov 2007 O 407. Cocconeis pseudolineata (Geitler) Lange-Bert. 2004 O/P [Cocconeis placentula var. pseudolineata Geitler] Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 29: 31–36; Petrovska & Stojanov 2007; Pavlov 2010 figs 5: 10–12 408. Cocconeis robusta Jurilj 1954* Jurilj 1954 fig. 19; Miho & Lange-Bertalot 2003, 2004; Levkov et al. 2003a figs 3–5; Levkov et al. 2007 figs 27: 1–11, 28: 1–4; Petrovska & Stojanov 2007 O 409. Cocconeis pseudothumensis E. Reichardt 1982 Levkov et al. 2003a figs 1: 13, 14; Levkov et al. 2007 figs 29: 1–20 O 410. Cocconeis robusta Leuduger-Fortmorel 1879 Pavlov 2010, figs 5: 1–3 O 411. Cocconeis scutellum Ehrenb. 1838 Miho & Lange-Bertalot 2004 O 412. Cocconeis theinemannii Hust. 1954 Levkov et al. 2007 figs 23: 25, 26 P DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 37 Order: Lyrelles D.G. Mann 1990 Family: Lyrellaceae D.G. Mann 1990 LYRELLA Karayeva 1978 413. Lyrella lyra (Ehrenb.) Karajeva 1978 Miho & Lange-Bertalot 2004 O PETRONEIS Stickle & D.G. Mann 414. Petroneis humerosa (Breb. ex W. Sm.) Stickle & D.G. Mann Miho & Lange-Bertalot 2004 O Order: Naviculales Bessey 1907 Sub-order: Neidiineae D.G. Mann 1990 Family: Cavinulaceae D.G. Mann 1990 CAVINULA D.G. Mann & Stickle 1990 415. Cavinula cocconeiformis (W. Greg.) D.G. Mann & Stickle 1990 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 68: 5 O/P 416. Cavinula mollicula (Hust.) Lange-Bert. 1996 O/P [Navicula mollicula Hust.] Hustedt 1945 figs 41: 34–36; Krammer & Lange-Bertalot 1986 fig. 73: 25; Simonsen 1987 figs 507: 36–43 417. Cavinula pseudoscutiformis (Hust.) D.G. Mann & Stickle 1990 O [Navicula scutelloides var. tenuis Jurilj] [Cavinula scutelloides var. tenuis Jurilj sensu Miho & Lange-Bert. nom. invalid] Jurilj 1954 fig. 43a; Petrovska & Stojanov 2007 418. Cavinula scutelloides (W. Sm.) Lange-Bert. 1995 O/P [Navicula scutelloides W. Sm. ex W. Greg.] Hustedt 1945; Jurilj 1954; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 68: 1–4, 6, 69: 5; Petrovska & Stojanov 2007; Kocev et al. 2010; Naumoski & Mitreski 2010 419. Cavinula scutiformis (Grunow ex A.Schmidt) D.G.Mann & Stickle 1990 Miho & Lange-Bertalot 2004 O 420. Cavinula variostriata (Krasske) D.G. Mann 1990 O [Navicula variostriata Krasske] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 Family: Cosmioneidaceae D.G. Mann 1990 COSMIONEIS D.G. Mann & Stickle 1990 421. Cosmioneis pusilla (W. Sm.) D.G. Mann & Stickle 1990 O [Navicula pusilla W. Smith] Kungulovski et al. 1987 Family: Diadesmisaceae D.G. Mann 1990 DIADESMIS Kütz. 1844 422. Diadesmis contenta (Grunow ex Van Heurck) D.G. Mann 1990 38 • Phytotaxa 45 © 2012 Magnolia Press O/W LEVKOV & WILLIAMS Levkov et al. 2007 figs 68: 25–28 423. Diadesmis contenta var. biceps (Grunow) P. Ham. 1992 O [Navicula contenta var. biceps Arn. ex Grunow] Hustedt 1945; Jurilj 1954 424. Diadesmis gallica (W.Sm.) Lange-Bert. 1996 O [Navicula gallica (W.Sm.) Lagerst.] [Navicula exilissima Grunow] Hustedt 1945; Jurilj 1954 425. Diadesmis perpusilla (Grunow) D. G. Mann 1990 Levkov et al. 2007 figs 68: 36–38 O/W LUTICOLA D.G.Mann 1990 426. Luticola cohnii (Hilse) D.G. Mann 1990 Miho & Lange-Bertalot 2004 O 427. Luticola kotschyi (Grunow) Mann 1990 Miho & Lange-Bertalot 2004 O 428. Luticola mutica (Kütz.) D.G. Mann 1990 O/W [Navicula mutica Kütz.] Hustedt 1945; Jurilj 1954 fig. 33a; Kungulovski et al. 1987; Mitić 1998a,b,c; Mitić & Patceva 1999b; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 68: 31 429. Luticola nivalis (Ehrenb.) D.G. Mann 1990 O/W [Navicula mutica var. nivalis (Ehrenb.) Hust.] [Luticola mutica var. nivalis (Ehrenb.) Lange-Bert.] Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 68: 29 430. Luticola mutica var. producta (Grunow) Lange-Bert. nom. invalid O [Navicula mutica var. producta Grunow] Jurilj 1954 fig. 33b; Miho & Lange-Bertalot 2004 431. Luticola ventricosa (Kütz.) D.G. Mann 1990 Levkov et al. 2007 fig. 68: 30 W 432. Luticola spec. sensu Levkov et al. 2007 Levkov et al. 2007 figs 68: 32–34 W Family: Amphipleuraceae Grunow 1862 AMPHIPLEURA Kütz. 1844 433. Amphipleura pellucida (Kütz.) Kütz. 1844 O/W Hustedt 1945; Jurilj 1954; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 118: 1; Petrovska & Stojanov 2007 FRUSTULIA Rabenh. 1853 434. Frustulia vulgaris (Thwaites) De Toni 1891 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 118: 3; Petrovska & Stojanov 2007 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press O/P • 39 435. Frustulia vulgaris var. elliptica Hust. 1937 Petrovska & Stojanov 2007 O Family: Brachysiraaceae D.G. Mann 1990 BRACHYSIRA Kütz. 1836 436. Brachysira brebissonii R. Ross 1986 W [Anomoeneis brachysira (Bréb.) Grunow] Levkov et al. 2007 fig. 118: 15; Petrovska & Stojanov 2007 437. Brachysira exilis (Kütz.) Round & D.G. Mann 1981 O [Anomoeneis exilis Cleve] Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 438. Brachysira neoexilis Lange-Bert. 1994 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 118: 16 O/W 439. Brachysira serians (Bréb.) Round & D.G. Mann 1981 O [Anomoeoneis serians (Bréb.) Cleve] Petrovska & Stojanov 2007 440. Brachysira serians var. acuta (Hust.) Vyverman 1991 O [Anomoeoneis serians var. acuta Hust.] Petrovska & Stojanov 2007 441. Brachysira styriaca (Grunow) R. Ross 1986 O [Anomoeoneis styriaca Grunow] Petrovska & Stojanov 2007 Family: Neidiaceae Mereschk. 1903 NEIDIUM Pfitzer 1871 442. Neidium acutum Levkov & Krstic 2007* Levkov et al. 2007 figs 116: 1–7; Pavlov 2010 figs 15: 1–5 O 443. Neidium affine (Ehrenb.) Pfitzer 1871 O [Neidium affine var. amphirhynchus (Ehrenb.) Cleve] Hustedt 1945; Jurilj 1954 fig. 47a; Kungulovski et al. 1987; Petrovska & Stojanov 2007 444. Neidium affine var. humeris Reimer 1966 Petrovska & Stojanov 2007 O 445. Neidium ampliatum (Ehrenb.) Krammer 1985 O/P/W [Neidium iridis f. vernalis Reichelt] Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 116: 8, 12; Petrovska & Stojanov 2007 446. Neidium amphigomphus (Ehrenb.) Pfitzer 1971 O [Neidium iridis var. amphigomphus (Ehrenb.) Van Heurck] Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 447. Neidium apiculatum Reimer 1959 Levkov et al. 2007 fig. 116: 10; Petrovska & Stojanov 2007 O 448. Neidium apiculatum var. constrictum Reimer 1959 Petrovska & Stojanov 2007 O 40 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 449. Neidium binodeforme Kramer 1985 Petrovska & Stojanov 2007; Pavlov 2010 fig. 15: 15 P 450. Neidium binodis (Ehrenb.) Hust. 1945 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 117: 1–17; Petrovska & Stojanov 2007; Pavlov 2010 figs 15: 6–14 O/P 451. Neidium bisulcatum (Lagerst.) Cleve 1894 Levkov et al. 2007 fig. 116: 11; Petrovska & Stojanov 2007 O 452. Neidium cuneatiforme Levkov 2007 Levkov et al. 2007 figs 114: 1–9 P 453. Neidium dubium (Ehrenb.) Cleve 189423 O [Neidium dubium var. constricta Hust.] [Neidium dubium morphotype biconstrictum sensu Levkov et al. 2007] [Neidium dubium morphotype ellipticum sensu Levkov et al. 2007] [Neidium dubium morphotype lanceolatum sensu Levkov et al. 2007] [Neidium dubium morphotype rostratum sensu Levkov et al. 2007] Hustedt 1945; Jurilj 1954 fig. 47c, d; Kungulovski et al. 1987; Miho 1998 fig. 2: 7; Patceva 2001; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 112: 4–8, 113: 1–10, 115: 1–5, 6–13, 116: 9 ; Petrovska & Stojanov 2007; Pavlov 2010 figs 16: 1–6 454. Neidium majus (Jurilj) Levkov 2007* O [Neidium dubium var. maius Jurilj] Jurilj 1954 fig. 48a, b; Petrovska & Stojanov 2007; Levkov et al. 2003a fig. 1: 9; Levkov et al. 2007 figs 111: 1–3, 112: 1–3 455. Neidium gracile Hust. 1937 Petrovska & Stojanov 2007 O 456. Neidium iridis (Ehrenb.) Cleve 1894 Hustedt 1945; Jurilj 1954 fig. 47b; Kungulovski et al. 1987; Miho 1998; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 457. Neidium productum (ex.Sm.) Cleve 1894 Kungulovski et al. 1987; Petrovska & Stojanov 2007 O Sub-order: Sellaphorineae D.G. Mann 1990 Family: Sellaphoraceae Mereschk. 1902 SELLAPHORA Mereschk. 1902 458. Sellaphora aff. americana (Ehrenberg) D.G. Mann Miho & Lange-Bertalot 2003b O 459. Sellaphora bacillioides (Hust.) Levkov, Krstic & Nakov 2006 O [Sellaphora bacilloides (Hust.) Lange-Bertalot nom. invalid] Miho & Lange-Bertalot 2004 460. Sellaphora aff. bacillioides (Hust.) Lange-Bert. nom.inval. Miho & Lange-Bertalot 2004 23. O In Levkov et al. (2007), N. dubium sensu lato was considered part of a species complex. They illustrated and distinguished four groups based on differences in valve shape and size. These groups have yet to be formally described and are still treated as part of N. dubium. It is likely that in a forthcoming revision of the Neidium dubium complex some of these four groups will be described as separate entities. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 41 461. Sellaphora bacillum (Ehrenb.) D.G. Mann 1990 O [Navicula bacillum Ehrenb.] Hustedt 1945; Jurilj 1954 fig. 34a, b; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 107: 22; Petrovska & Stojanov 2007 462. Sellaphora aff. bacillum (Ehrenb.) D.G. Mann 1990 Miho & Lange-Bertalot 2003 O 463. Sellaphora capitata D.G. Mann & McDonald 2004 Levkov 2010 W 464. Sellaphora gregoryana (Grunow) Metzeltin & Lange-Bert. 199824 O [Navicula bacillum f. gregoryana Grunow] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 465. Sellaphora krsticii Levkov, Nakov & Metzeltin 2006* O [Sellaphora aff. americana (Ehrenb.) D.G. Mann sensu Miho & Lange-Bertalot] Miho & Lange-Bertalot 2003; Levkov et al. 2006a figs 14–29, 2007 figs 101: 1–6, 102: 1–6 466. Sellaphora laevissima (Kütz.) D.G. Mann 1989 P [Navicula laevissima Kütz. 1844] Kungulovski et al. 1987; Levkov et al. 2007 figs 106: 8, 9 467. Sellaphora macedonica Levkov & Metzeltin 2007* Levkov et al. 2007 figs 106: 1–7, 108: 3, 4; Pavlov 2010 fig. 13: 37 O 468. Sellaphora mutata (Krasske) Lange-Bert. 1996 O/P [Sellaphora pupula var. mutata (Krasske) Hust.] Miho & Lange-Bertalot 2004 469. Sellaphora aff. mutata (Krasske) Lange-Bert. s.l Miho & Lange-Bertalot 2004 O/P 470. Sellaphora mutatoides Lange-Bert. & Metzeltin 2003 Metzeltin & Lange-Bertalot 2003 figs 31: 23, 24, 34: 13; Levkov et al. 2007 figs 106: 20, 107: 18; Pavlov 2010 figs 13: 30–34 O/P 471. Sellaphora ohridana Levkov & Krstic 2007* O [Sellaphora bacillum (Ehrenberg) D.G. Mann sensu Levkov et al. 2006a, figs 8–13] Miho & Lange-Bertalot 2004; Levkov et al. 2006a figs 8–13; Levkov et al. 2007 figs 103: 1–14, 104: 1–6, 472. Sellaphora cf. parapupula Lange-Bert. 1996 Levkov et al. 2007 fig 108: 6 O 473. Sellaphora perbacilloides Levkov, Nakov & Metzeltin 2007* Levkov et al. 2006a fig. 30–46; 2007 figs 105: 1–13 P 474. Sellaphora pseudomutatoides Levkov & Metzeltin 2007* Levkov et al. 2007 figs 106: 10–19 O 475. Sellaphora pseudopupula (Krasske) Lange-Bert. 1996 W [Sellaphora pupula var. pseudopupula (Krasske) Hust.] Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 107: 9–15 476. Sellaphora pupula (Kütz.) Mereschk. 1902 O/P [Navicula pupula Kütz.] Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 107: 17–21, 108: 1; Petrovska & Stojanov 2007; Pavlov 2010 figs 13: 35, 36 24. This species was confused with S. krsticii. 42 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 477. Sellaphora pupula var. densistriata Lange-Bert. & Metzeltin 1996 Levkov et al. 2007 fig. 107: 16 P 478. Sellaphora aff. pupula var. elliptica Hust. nom. invalid. Miho & Lange-Bertalot 2004 O 479. Sellaphora pupula var. rostrata (Hust.) Aboal 2003 O [Navicula pupula var. rostrata Hust.] Hustedt 1945; Jurilj, 1954; Miho & Lange-Bertalot 2003, 2004 480. Sellaphora aff. pupula var. rostrata (Hust.) Aboal 2003 Miho & Lange-Bertalot 2003 – 481. Sellaphora rectangularis (W. Greg.) Lange-Bert. & Metzeltin 1996 Levkov et al. 2007 fig. 107: 25 P 482. Sellaphora seminulum (Grunow) D. G. Mann 1990 O [Navicula seminulum Grunow] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004 483. Sellaphora subpupula Levkov 2007* Levkov et al. 2007 figs 107: 9–15, 108: 2; Pavlov 2010 figs 13: 1–29 484. Sellaphora vitabunda (Hust.) D.G. Mann 1989 O/P O [Naviculadicta vitabunda (Hust.) Lange-Bert. nom. invalid] Miho & Lange-Bertalot 2004 485. Sellaphora sp. sensu Levkov et al. 2007 Levkov et al. 2007 fig. 108: 5 O 486. Sellaphora sp. (? nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 107: 26–31 O FALLACIA Stickle & D.G.Mann 1990 487. Fallacia fracta (Hust. ex Simonsen) D.G. Mann 1990 Levkov et al. 2007 fig. 66: 41; Pavlov 2010 figs 14: 18–26 O 488. Fallacia frustulum (Hust.) D.G. Mann 1990* O [Navicula frustulum Hust.] Hustedt 1945 figs 41: 18, 19; Jurilj 1954 489. Fallacia helensis (E. Schulz) D.G. Mann 1990 O [Navicula helensis E. Schulz] Jurilj 1954; Čado 1978; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 68: 19–24; Pavlov 2010 figs 34, 35 490. Fallacia insociabilis (Krasske) D.G. Mann 1990 O/P [Navicula insociabilis Krasske] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 68: 12, 13, 69: 1, 2 491. Fallacia lenzii (Hust.) Lange-Bert. 2004* Werum & Lange-Bertalot 2004; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 66: 4244, 96: 3; Pavlov 2010 figs 14: 30–32 O 492. Fallacia mitis (Hust.) D.G. Mann 1990 O [Navicula mitis Hust.] Hustedt 1945 figs 41: 11–14; Jurilj 1954; Simonsen 1987 figs 508: 10–15; Miho & LangeBertalot 2004 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 43 493. Fallacia monoculata (Hust.) D.G. Mann 1990 O/P [Navicula monoculata Hust.] Hustedt 1945 fig. 41: 4; Krammer & Lange-Bertalot 1986 figs 66: 12–16; Simonsen 1987 figs 508: 40, 41; Levkov et al. 2007 figs 68: 14–17 494. Fallacia omissa (Hust.) D.G. Mann 1990* O [Navicula omissa Hust.] Hustedt 1945 fig. 41: 6; Krammer & Lange-Bertalot 1986 figs 66: 17, 81; Simonsen 1987 figs 508: 16–18; Levkov et al. 2007 figs 66: 30–33 495. Fallacia ochridana (Hust.) Levkov & Krstic 2007* O/P [Navicula ochridana Hust.] Hustedt 1945 figs 41: 44, 45; Jurilj 1954; Simonsen 1987 figs 507: 2–25; Levkov et al. 2007 figs 66: 30–33; Petrovska & Stojanov 2007; Pavlov 2010 14: 27–29 496. Fallacia pygmaea (Kütz.) Stickle & D.G. Mann 1990 O/P [Navicula pygmaea Kütz.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 68: 7–11; Petrovska & Stojanov 2007 497. Fallacia subhamulata (Grunow) D.G. Mann 1990* O [Navicula subhamulata Grunow] Hustedt 1945; Jurilj 1954 fig. 33c; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 68: 18; Petrovska & Stojanov 2007 498. Fallacia sublucidula (Hust.) D.G. Mann 1990 Miho & Lange-Bertalot 2004 O 499. Fallacia submitis (Hust.) D.G. Mann 1990* O [Navicula submitis Hust.] Hustedt 1945 fig. 41: 10; Jurilj 1954, Krammer & Lange-Bertalot 1986 fig. 66: 43; Simonsen 1987 figs 508: 19–21 Family: Pinnulariaceae D.G. Mann 1990 DIATOMELLA Grev. 1855 500. Diatomella balfouriana Greville 1855 Petrovska & Stojanov 2007 O/W OESTRUPIA Heiden ex Hust. 1935 501. Oestrupia bicontracta (Østrup) Lange-Bert. & Krammer 1985 O/P [Navicula bicontracta Østrup] Hustedt 1945, fig. 41: 3; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 67: 6, 7. PINNULARIA Ehrenb. 1843 502. Pinnularia borealis Ehrenb. 1843 Hustedt 1945; Jurilj 1954 fig. 44c; Kungulovski et al. 1987; Levkov et al. 2007 fig. 188: 9; Petrovska & Stojanov 2007 503. Pinnularia brebissonii (Kütz.) Rabenh. 1864 W P [Pinnularia microstauron var. brebisonii (Kütz.) Mayer] 44 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Hustedt 1945; Jurilj 1954 fig. 44a, b; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 188: 7, 8 504. Pinnularia lata (Bréb.) Rabenh. 1853 Kungulovski et al. 1987 W 505. Pinnularia microstauron (Ehrenb.) Cleve 1891 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 188: 6; Petrovska & Stojanov 2007 P 506. Pinnularia neomajor Krammer 1992 O [Pinnularia maior (Kütz.) Cleve] Jurilj 1954 fig. 46c; Miho 1998; Kungulovski et al. 1987; Levkov et al. 2007 figs 189: 2, 3; Miho 1998; Miho & Lange-Bertalot 2004 507. Pinnularia nobilis Ehrenb. 1843 Jurilj 1954 fig. 46d; Petrovska & Stojanov 2007 O 508. Pinnularia paralella Brun 1895 Miho & Lange-Bertalot 2004 O 509. Pinnularia rupestris Hantzsch 1961 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 188: 5 P 510. Pinnularia stomatophora (Grunow) Cleve 1895 Levkov et al. 2007 fig. 188: 4 P 511. Pinnularia subborealis Hust. 1921 Petrovska & Stojanov 2007 O 512. Pinnularia subcapitata W. Greg. 1856 Miho & Lange-Bertalot 2004 O 513. Pinnularia subgibba Krammer 1992 Levkov 2010 W 514. Pinnularia undula (Schum.) Krammer 2000 Levkov et al. 2007 fig. 188: 3 P 515. Pinnularia viridiformis Krammer 1992 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 188: 2, 189: 4 O/P 516. Pinnularia viridis (Nitzsch) Ehrenb. 1843 Beck 1904; Hustedt 1945; Jurilj 1954 fig. 45a, b, c; Čado 1977; Kungulovski et al. 1987; Levkov et al. 2007 figs 188: 1, 189: 1; Petrovska & Stojanov 2007 O/P 517. Pinnularia viridis f. areata Jurilj 1954 Jurilj 1954 fig. 46a; Petrovska & Stojanov 2007 O 518. Pinnularia viridis f. brevis Jurilj 1954 Jurilj 1954 fig. 46b; Petrovska & Stojanov 2007 O Sub-order: Diploneidineae D.G. Mann 1990 Family: Diploneidaceae D.G. Mann 1990 DIPLONEIS Ehrenb. 1844 519. Diploneis alpina F. Meister 1912 O [Diploneis domblitensis var. subconstricta A. Cleve] [Diploneis subconstricta (A. Cleve) Cleve-Euler] DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 45 Hustedt 1945; Jurilj 1954 fig. 27a, b; Čado 1977 fig. 3: 2; Levkov et al. 2007 figs 119: 1–7, 120: 1–4; Petrovska & Stojanov 2007 520. Diploneis-aff. alpina (nov. spec.?) sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 521. Diploneis budayana (Pant.) Jurilj 1954# Jurilj 1954 fig. 28a, b; Petrovska & Stojanov 2007 O 522. Diploneis budayana var. punctata Jurilj 1954* Jurilj 1954 fig. 29; Petrovska & Stojanov 2007 O 523. Diploneis domblitensis (Grunow) Cleve 1894#25 Hustedt 1945; Jurilj 1954 fig. 26a, b; Čado 1977 fig. 3: 1; Levkov et al. 2007 figs 122: 9–11; Petrovska & Stojanov 2007 O 524. Diploneis elliptica (Kütz.) Cleve 1891 Hustedt 1945; Jurilj 1954; Čado 1971, 1977 fig. 3: 3; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 121: 7–12; Petrovska & Stojanov 2007 O/P 525. Diploneis elliptica f. rhombica Hust. 1945 Hustedt 1945 O 526. Diploneis fontanella Lange-Bert. 2004 Levkov 2010 W 527. Diploneis heisingeriae Jurilj 1954* Jurilj 1954 fig. 25b; Levkov et al. 2007 fig. 122: 16; Petrovska & Stojanov 2007 O 528. Diploneis cf. krammeri Lange-Bert. & E. Reichardt 2000 Levkov et al. 2007 fig. 122: 14; Pavlov 2010 figs 17: 6–8 P 529. Diploneis margenistriata Hust. 1922 Jurilj 1954 fig. 25c; Miho & Lange-Bertalot 2004 O 530. Diploneis mauleri (Brun) Cleve 1894 Hustedt 1945; Jurilj 1954 fig. 23a, b; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 123: 1–9; Petrovska & Stojanov 2007, Kocev et al. 2010, Naumoski & Mitreski 2010; Pavlov 2010 figs 17: 1–5 O/P 531. Diploneis modica Hust. 1945 Hustedt 1945 figs 42: 23, 24; Jurilj 1954; Krammer & Lange-Bertalot 1986 fig. 110: 12; Simonsen 1987 figs 506: 38–41; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 124: 1– 16; Petrovska & Stojanov 2007 O 532. Diploneis oblongella (Naegeli) A. Cleve 1922 O [Diploneis ovalis var. oblongella A. Cleve] [Diploneis ovalis var. oblongella f. gibbosa Hust.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004 533. Diploneis oculata (Bréb.) A. Cleve 1894 Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 O 534. Diploneis ostracodarum (Pant.) Jurilj 1954# Jurilj 1954 fig. 24a; Levkov et al. 2007 figs 121: 1–6; Petrovska & Stojanov 2007 O 535. Diploneis ostracodarum var. elongata Jurilj 1954* Jurilj 1954 fig. 24b O 536. Diploneis ovalis (Hilse) Cleve 1891 25. O/P Valves identified as Diploneis domblitensis by Levkov et al. (2007: figs 122: 9–11) belong to an as yet described species. 46 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 537. Diploneis parma Cleve 1891 Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 122: 12; Petrovska & Stojanov 2007 O 538. Diploneis petersenii Hust. 1937 Levkov et al. 2007 figs 124: 17–19 P 539. Diploneis praeclara (Pant.) A. Cleve 1934# O [Diploneis praeclara (Pant.) Jurilj] Jurilj 1954 fig. 24c; Petrovska & Stojanov 2007 540. Diploneis praeclara var. densa Jurilj 1954# Jurilj 1954 O 541. Diploneis pseudoovalis Hust. 1930 Levkov et al. 2007 fig. 122: 13; Petrovska & Stojanov 2007 P 542. Diploneis smithii var. rhombica Mereschk. 1902 Petrovska & Stojanov 2007 O 543. Diploneis subovalis Cleve 1894 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 544. Diploneis tavcharii Jurilj 1954* Jurilj 1954 fig. 25a; Levkov et al. 2007 fig. 122: 15; Petrovska & Stojanov 2007 O Sub-order: Naviculineae Hendey 1937 Family: Naviculaceae Kütz. 1844 ADLAFIA Gerd Moser, Lange-Bert. & Metzeltin 1999 545. Adlafia bryophila (Petersen) Moser, Lange-Bert. & Metzeltin 1999 O [Navicula bryophila J.B. Petersen] Hustedt 1945; Jurilj 1954 546. Adlafia minuscula (Grunow) Lange-Bert. 1999 O [Navicula minuscula Grunow] [Naviculadicta minuscula (Grunow) Lange-Bert. nom. invalid] Hustedt 1945; Jurilj 1954; Lange-Bertalot 2001; Miho & Lange-Bertalot 2004 547. Adlafia minuscula var. muralis (Grunow) Lange-Bert. 1999 O [Navicula muralis Grunow] Hustedt 1945; Jurilj 1954 FISTULIFERA Lange-Bert. 1997 548. Fistulifera saprophila (Lange-Bert. & Bonik) Lange-Bert. 1997 O [Naviculadicta saprophila Lange-Bert. sensu Miho & Lange-Bertalot nom. invalid] Miho & Lange-Bertalot 2004; Shumka & Miho 2005 CALONEIS Cleve 189426 549. Caloneis acuta Levkov & Metzeltin 2007* 26. O Species in the genus Caloneis are very diverse in Lake Ohrid. Several taxa were observed but their identity remains certain. Taxonomic revision is necessary to establish the exact number of taxa present. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 47 [Caloneis silicula f. recta Jurilj 1954] [Caloneis silicula var. paralella Jurilj 1954] Jurilj 1954; Petrovska & Stojanov 2007; Levkov et al. 2007 figs 184: 1–13 550. Caloneis aerophila W. Bock 1963 Miho & Lange-Bertalot 2004; Shumka & Miho 2005 O 551. Caloneis alpestris (Grunow) Cleve 1894 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 552. Caloneis amphisbaena (Bory) Cleve 1894 Patceva 2001; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 553. Caloneis bacillum (Grunow) Cleve 1894 Hustedt 1945; Jurilj 1954 fig. 49a; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 O 554. Caloneis biconstrictoides Levkov 2007* Levkov et al. 2007 figs 183: 1–5 O/P 555. Caloneis clavicula Levkov & Metzeltin 2007* Levkov et al. 2007 figs 183: 6–10 O/P 556. Caloneis lancettula (E. Schulz) Lange-Bert. & Witkowski 1996 O [Caloneis bacilum var. lancetulla (E. Schulz) Hust.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 185: 16–18; Petrovska & Stojanov 2007 557. Caloneis leptosoma (Grunow) Krammer 1985 O [Pinnularia leptosoma Grunow] Hustedt 1945; Jurilj 1954 558. Caloneis meridionalis Levkov & Krstic 2007* Levkov et al. 2007 figs 186: 7–12 O 559. Caloneis schumaniana (Ehrenb.) Cleve 1894 Hustedt 1945; Jurilj 1954 fig. 51a, b; Čado 1977; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 560. Caloneis schumaniana var. biconstricta (Grunow) A. Reichelt 1903 Hustedt 1945; Jurilj 1954 fig. 52a, b, c, d, e; Levkov et al. 2007 figs 181: 1–6; Petrovska & Stojanov 2007 O/P 561. Caloneis schumaniana var. lancettula Hust. 1930 Jurilj 1954 fig. 51c, d, e; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 186: 1–6 O/P 561. Caloneis schumanniana var. (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 187: 1–13 O 563. Caloneis silicula (Ehrenb.) Cleve 1894 Hustedt 1945; Jurilj 1954 fig. 49b; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 185: 1–7; Petrovska & Stojanov 2007 O/P 564. Caloneis silicula f. claviceps Hust. 1945 Hustedt 1945 fig. 42: 26; Jurilj 1954 fig. 49c; Simonsen 1987 figs 512: 1, 2 O 565. Caloneis silicula var. gibberula (Kütz.) Cleve 1894 Levkov et al. 2007 figs 182: 1–5 P 566. Caloneis silicula var. major Skv. 1937 Petrovska & Stojanov 2007 O 48 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 567. Caloneis silicula var. peisonis Hust. 1930 Jurilj 1954 fig. 50d; Petrovska & Stojanov 2007 O 568. Caloneis silicula var. truncatula (Grunow) Cleve 1894 Jurilj 1954 fig. 50a, b, c; Levkov et al. 2007 figs 185: 8, 9; Petrovska & Stojanov 2007 569. Caloneis silicula var. tumida Hust. 1909 Jurilj 1954; Levkov et al. 2007 figs 182: 6–9; Petrovska & Stojanov 2007 O/W O/P 570. Caloneis thermalis (Grunow) Krammer 1985 Miho-Lange-Bertalot 2004 O 571. Caloneis sp. 1 (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 183: 11–15 O 572. Caloneis sp. 2 (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 183: 16–23 O 573. Caloneis sp. 3 (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 183: 24–26 O 574. Caloneis spec. 1 sensu Levkov et al. 2007 Levkov et al. 2007 figs 185: 14, 15 O 575. Caloneis spec. 2 sensu Levkov et al. 2007 Levkov et al. 2007 figs 185: 19–21 O GEISSLERIA Lange-Bert. & Metzeltin 1996 576. Geissleria acceptata (Hust.) Lange-Bert. & Metzeltin 1996 Miho & Lange-Bertalot 2004 577. Geissleria decussis (Østrup) Lange-Bert. & Metzeltin 1996 [Navicula decussis Østrup] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 87: 1–5, 10–11 578. Geissleria aff. decussis (Østrup) Lange-Bert. & Metzeltin 1996 Lange-Bertalot 2001; Miho & Lange-Bertalot 2003, 2004; Levkov et al. 2007 fig. 87: 6 579. Geissleria ohridana Levkov 2007* Levkov et al. 2007 figs 88: 1–15 580. Geissleria schoenfeldii (Hust.) Lange-Bert. & Metzeltin 1996 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 87: 7–9 581. Geissleria sp. sensu Levkov et al. 2007 Levkov et al. 2007 figs 87: 12–14 O O/P O O O/P O HIPPODONTA Lange-Bert., Metzeltin & Witkowski 199627 582. Hippodonta capitata (Ehrenb.) Lange-Bert., Meltzeltin & Witkowski 1996 O [Navicula hungarica var. capitata (Ehrenb.) Cleve] Hustedt 1945; Jurilj 1954, Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 583. Hippodonta costulata (Grunow) Lange-Bert., Meltzeltin & Witkowski 1996 O/P [Navicula costulata Grunow] Hustedt 1945; Jurilj 1954 fig. 38a, b, c; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 85: 1, 2, 86: 4–10; Petrovska & Stojanov 2007; Pavlov 2010 figs 14: 4–11 584. Hippodonta costulatiformis Lange-Bert., Metzeltin & Witkowski 1996 Levkov et al. 2007 figs 84: 1–18; Pavlov 2010 figs 14: 13–17 27. O This genus requires revision since several taxa have been illustrated but not identified. DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 49 585. Hippodonta hungarica (Grunow) Lange-Bert., Meltzeltin & Witkowski 1996 O [Navicula hungarica Grunow] Kungulovski et al. 1987 586. Hippodonta aff. kociolekii Lange-Bert., Metzeltin & Witkowski 1996 Miho & Lange-Bertalot 2004 O 587. Hippodonta lueneburgensis (Grunow) Lange-Bert., Metzeltin & Witkowski 1996# Levkov et al. 2007 figs 83: 1–5, 85: 4, 5; Pavlov 2010 fig. 14: 12 O 588. Hippodonta rostrata (Hust.) Lange-Bert., Meltzeltin & Witkowski 1996 Levkov et al. 2007 figs 86: 11–14 P 589. Hippodonta sp. 1 (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 fig. 85: 3 P 590. Hippodonta sp. 2 (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 fig. 86: 1–3 P 591. Hippodonta sp. 3 (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 fig. 86: 15–22; Pavlov 2010 figs 14: 1–3 O KOBAYASIELLA Lange-Bert. 1999 592. Kobayasiella subtilissima (Cleve) Lange-Bert. 1999 O [Navicula subtilissima Cleve] Petrovska & Stojanov 2007 MUELLERIA (Freng.) Freng. 1945 593. Muelleria terrestris (J.B. Petersen) S. Spaulding & Stoermer Levkov et al. 2007 fig. 68: 35 O NUPELLA Vyverman & Compère 1991 594. Nupela lapidosa (Krasske) Lange-Bert. 1999 Levkov et al. 2007 figs 23: 30, 31 P NAVICULA Bory 182228 595. Navicula absoluta Hust. 1950 O [Naviculadicta absoluta (Hust.) Lange-Bert. nom. invalid] Miho & Lange-Bertalot 2004 596. Navicula antonii Lange-Bert. 2000 O [Navicula menisculus var. grunowii Lange-Bertalot] Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 42: 28–34; Pavlov 2010 figs 10–19 597. Navicula cf. antonii Lange-Bert. 2000 Levkov et al. 2007 figs 42: 14–17 O 598. Navicula blazenciciae Levkov & Krstic 2007* Levkov et al. 2007 figs 40: 1–14 P 599. Navicula cadoi Levkov & Krstic 2007* Levkov et al. 2007 figs 43: 19–30 P 28. The treatment of this genus is in its broad sense, since many species recorded do not belong to Navicula sensu stricto. 50 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 600. Navicula capitatoradiata H. Germ. 1981 O/P [Navicula cryptocephala var. intermedia Grunow] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 45: 5, 6, 46: 24–31; Petrovska & Stojanov 2007 601. Navicula cari Ehrenb. 1836 O/P [Navicula graciloides A. Mayer] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 41: 16–19 602. Navicula cincta (Ehrenb.) Ralfs 1861 Hustedt 1945; Jurilj 1954 fig. 40c; Miho 1998; Miho & Lange-Bertalot 2004 O 603. Navicula constans Hust. 1944 W [Placoneis constans Hust. sensu Miho & Lange-Bertalot 2004, nom. invalid] Miho & Lange-Bertalot 2004 604. Navicula cruciculla (W. Sm.) Donkin 1871 Miho 1998 – 605. Navicula cryptocephala Kütz. 1844 Beck 1904; Hustedt 1945; Jurilj 1954; Lange-Bertalot 2001; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 40: 17–19; Petrovska & Stojanov 2007 606. Navicula cf. cryptocephala Kütz. 1844 Levkov et al. 2007 figs 43: 6–9 O/P O/W 607. Navicula cryptotenella Lange-Bert. 1985 Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 41: 9–13, 46: 12–17 O/P 608. Navicula cryptotenelloides Lange-Bert. 1993 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 41: 14, 15 O/P 609. Navicula dealpina Lange-Bert. 1993 Miho & Lange-Bertalot 2004 O 610. Navicula demissa Hust. 1945* Hustedt 1945 fig. 41: 5; Jurilj 1954; Simonsen 1987 figs 508: 4–6 O 611. Navicula erifuga Lange-Bert. 1985 Levkov et al. 2007 figs 63: 11, 12 P 612. Navicula exilis Kütz. 1844 Miho & Lange-Bertalot 2004 O 613. Navicula exigua var. capitata R.M. Patrick 1945 Petrovska & Stojanov 2007 O 614. Navicula flabelliformis Hust. sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 615. Navicula gottlandica Grunow 1857 Petrovska & Stojanov 2007 O 616. Navicula gracilis f. parvuloundosa Čado 1977 nom. invalid29 Čado 1977 fig. 1: 3; Levkov et al. 2007 fig. 33: 8 O 617. Navicula gregaria Donkin 1861 Levkov et al. 2007 figs 40: 20–22 29. P Čado (1977: fig. 1: 3) provided an illustration of his new taxon (reproduced in Levkov et al. 2007: fig. 33: 8) but a description was lacking. However, specimens from Lake Ohrid of Navicula tripunctata (= N. gracilis) have larger initial and vegetative cells (up to 95 µm) and slightly protracted and acute apices (see Levkov et al.: fig. 33:7). DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 51 618. Navicula grimmei Krasske 1930 Hustedt 1945; Jurilj 1954 O 619. Navicula hasta Pantocsek 1892# Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 620. Navicula hastata Jurilj 1954* Jurilj 1954 fig. 42b; Miho & Lange-Bertalot 2004; Levkov et al. 2003a fig. 1: 20; Levkov et al. 2007 figs 49: 2, 3, 50: 1–5, 51: 1–4; Petrovska & Stojanov 2007 O/P 621. Navicula hastatula Lange-Bert. & Miho 2001* Lange-Bertalot 2001; Miho & Lange-Bertalot 2003 figs 9, 10; Miho & Lange-Bertalot 2004; Kupe & Miho 2006; Petrovska & Stojanov 2007 O 622. Navicula inclinata Hust. 1945* Hustedt 1945 fig. 41: 17; Jurilj 1954; Simonsen 1987 figs 508: 1–3 O 623. Navicula jakovljevici Hust. 1945 Hustedt 1945 figs 40: 17, 18; Jurilj 1954 fig. 43d; Simonsen 1987 figs 511: 5–14; Miho & Lange-Bertalot 2004; Levkov et al. 2003a figs 1: 14–17; Levkov et al. 2007 figs 64: 1–7, 65: 1–8 O 624. Navicula aff. krammerie Lange-Bert. Miho & Lange-Bertalot 2004 O 625. Navicula krsticii Levkov 2007* Levkov et al. 2007 figs 57: 1–15, 58: 1–5 O/P 626. Navicula lacustris f. gibbosa (Brun) Hust. 1964 Petrovska & Stojanov 2007 O 627. Navicula lanceolata (C. Agardh) Kütz. 1844 Levkov et al. 2007 W 628. Navicula libonensis Schoeman 1970 Levkov et al. 2007 figs 43: 10–18 P 629. Navicula mediocostata E. Reichardt 1988 Miho & Lange-Bertalot 2004 O 630. Navicula melovskii Levkov & Krstic 2007* Levkov et al. 2007 figs 39: 1–12 O/P 631. Navicula menisculus Schum. 1867 Hustedt 1945 fig. 42: 25; Jurilj 1954; Petrovska & Stojanov 2007 O 632. Navicula menisculus nov. var. ? sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 633. Navicula modica Hust. 1945 Hustedt 1945 figs 41: 21–23; Jurilj 1954; Krammer & Lange-Bertalot 1986 figs 71: 9–13; Simonsen 1987 figs 507: 17–21; Levkov et al. 2007 figs 66: 48, 49 O 634. Navicula muraloides Hust. 1950 O [Naviculadicta muraloides (Hust.) Lange-Bert. nom. invalid] Miho & Lange-Bertalot 2004 635. Navicula oblonga Kütz. 1844 Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 31: 1–2 636. Navicula oblonga var. subcapitata Pant. 1892# Jurilj 1954 fig. 42a 52 • Phytotaxa 45 © 2012 Magnolia Press O/W O LEVKOV & WILLIAMS 637. Navicula occulta Krasske 1929 Levkov et al. 2007 figs 66: 50–52 O 638. Navicula ognjanovae Levkov & Metzeltin 2007* Levkov et al. 2007 figs 41: 20–25; Pavlov 2010 fig. 12: 9 O/P 639. Navicula oligotraphenta Lange-Bert. & Hofmann 1993 Miho & Lange-Bertalot 2004 O 640. Navicula opportuna Hust. 1950 O [Placoneis porifera var. opportuna Hustedt sensu Miho & Lange-Bertalot] Miho & Lange-Bertalot 2004 641. Navicula oppugnata Hust. 1945 Hustedt 1945 fig. 42: 1; Jurilj 1954 fig. 37a; Krammer & Lange-Bertalot 1986 figs 40: 8, 9; Simonsen 1987 figs 510: 1–5; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 642. Navicula parabilis M.H. Hohn & Hellerman 1963 Miho & Lange-Bertalot 2004 O 643. Navicula paracari Lange-Bert. nom. invalid Lange-Bertalot 2001 O 644. Navicula parahasta Lange-Bert. & Miho 2001 Lange-Bertalot 2001; Miho & Lange-Bertalot 2003 figs 7, 8; Miho & Lange-Bertalot 2004; Kupe & Miho 2006; Levkov et al. 2003a figs 1: 24–25; Levkov et al. 2007 figs 49: 1, 52: 1–7; Petrovska & Stojanov 2007 O 645. Navicula paraobesa Metzeltin & Levkov 2007* Levkov et al. 2007 figs 59: 1–10, 60: 6 O 646. Navicula perminuta Grunow 1880 Miho & Lange-Bertalot 2004 O 647. Navicula perturbata Jurilj 1954* Jurilj 1954 fig. 43c; Lange-Bertalot 2001; Miho & Lange-Bertalot 2003, 2004; Levkov et al. 2003a figs 1: 6–8; Levkov et al.2007 figs 61: 1–4; Petrovska & Stojanov 2007 O 648. Navicula perturbata var. lata Levkov & Nakov 2007* Levkov et al. 2007 figs 62: 1–3 O 649. Navicula petrovskae Levkov & Krstic* Levkov et al. 2007 figs 44: 1–12, 45: 2 O 650. Navicula plancetula var. apiculata Hust. 1911 Jurilj 1954 fig. 40a, b; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 651. Navicula platystoma Ehrenb. 1838 Hustedt 1945 fig. 42: 20; Jurilj 1954 fig. 41d; Miho & Lange-Bertalot 2004; Miho & LangeBertalot 2006 fig. 71; Levkov et al. 2007 figs 64: 8, 9 O/P 652. Navicula praeterita Hust. 1945 Hustedt 1945 figs 42: 5–8; Krammer & Lange-Bertalot 1986 fig. 36: 4; Simonsen 1987 figs 509: 6–8; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 45: 3, 46: 18–23; Pavlov 2010 figs 12: 1–8 O/P 653. Navicula prespanensis Levkov & Metzeltin 2007* Levkov et al. 2007 figs 37: 1–21, 38: 1–4, Kocev et al. 2010; Naumoski & Mitreski 2010 O/P 654. Navicula protracta (Grunow) Cleve 189430 O/P [Parlibelus protracta (Grunow) Witkowski, Lange-Bert. & Metzeltin] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 64: 10–12 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 53 655. Navicula pseudoantonii Levkov & Metzeltin 2007* Levkov et al. 2007 figs 44: 13–25; Pavlov 2010 figs 11: 20–27 P 656. Navicula pseudolanceolata Lange-Bert. 1980 Miho & Lange-Bertalot 2004 O 657. Navicula pseudoppugnata Lange-Bert. & Miho* Lange-Bertalot 2001; Miho & Lange-Bertalot 2003 figs 5, 6; Miho & Lange-Bertalot 2004; Kupe & Miho 2006 O 658. Navicula pupula var. capitata Hust. 1930 Hustedt 1945 Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 659. Navicula cf. pussilla var. incognita (Krasske) Lange-Bert. 1985 Miho & Lange-Bertalot 2004 O 660. Navicula radiosa Kütz. 1844 O/W Beck 1904; Hustedt 1945; Jurilj 1954 fig. 36c; Kungulovski et al. 1987; Miho 1998 fig 2: 4; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 31: 3, 4; Petrovska & Stojanov 2007 661. Navicula rakowskae Lange-Bert. emend Levkov & Nakov 2007 Levkov et al. 2003a figs 21–23; Levkov et al. 2007 figs 53: 1–9, 54: 1–5, 216: 2–6 O/P 662. Navicula recens (Lange-Bert.) Lange-Bert. 1985 Miho & Lange-Bertalot 2004 O 663. Navicula reichardtiana Lange-Bert. 1989 Miho & Lange-Bertalot 2004 O О 664. Navicula reichardtiana var. crassa Lange-Bert. & Hofmann 1993 Miho & Lange-Bertalot 2004 О/P 665. Navicula reinhardtii (Grunow) Grunow 1877 [Navicula reinhardtii var. elliptica Hérib.] Hustedt 1945; Jurilj 1954 fig. 37b, c; Kungulovski et al. 1987; Miho 1998 fig. 2: 6; Miho & Lange-Bertalot 2004; Levkov et al. 2003b figs 1: 20, 21; Shumka & Miho 2005; Levkov et al. 2007 figs 34: 1–10; Petrovska & Stojanov 2007 666. Navicula reinhardtii var. rhomboelliptica Levkov, Krstic & Nakov 2007* O/P [Navicula reinhardtii morphotype rhombica sensu Edlund et al. 2006] [Navicula reinhardtii morphotype acutasensu Levkov et al. 2003b] Edlund et al. 2006b; Levkov et al. 2003b, figs 1: 18, 19, 22, 23; Levkov et al. 2007 figs 35: 1–6, 36: 1–8 667. Navicula rhynchocephala Kütz. 1844 Beck 1904; Hustedt 1945; Jurilj 1954; Levkov et al. 2007; Petrovska & Stojanov 2007 668. Navicula rostellata Kütz. 1844 O/W O [Navicula viridula var. rostellata (Kütz.) Cleve] Jurilj 1954 fig. 36a, b; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 669. Navicula rotunda Hust. 1945 O/P [Sellaphora rotunda (Hust.) Lange-Bert. nom. invalid] Hustedt 1945 fig. 41: 29; Jurilj 1954; Krammer & Lange-Bertalot 1986 figs 69: 11–13; Simonsen 1987 figs 507: 14–16; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 67: 1, 2, Kocev et al. 2010 30. Parlibellus protracta (Grunow) Witkowski, Lange-Bert. et Metzeltin (=Navicula protracta) sensu Levkov et al. (2007: figs 64: 10–12) belongs to a different species since described as Prestauroneis tumida Levkov (in Levkov & Williams 2011). 54 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 670. Navicula sancti-naumii Levkov & Metzeltin 2007 Levkov et al. 2007 figs 42: 1–13, 45: 4, 47: 3–5 O 671. Navicula schadei Krasske 1929 O [Naviculadicta schadeii (Krasske) Lange-Bert. nom. invalid] Miho & Lange-Bertalot 2004 672. Navicula schroeteri F. Meister 1932 Miho & Lange-Bertalot 2004 O 673. Navicula seibigiana Lange-Bert. 1993 Miho & Lange-Bertalot 2004 O 674. Navicula slesvicensis Grunow 1880 Miho & Lange-Bertalot 2004 O 675. Navicula splendicula VanLand. 1975* O [Navicula certa Hust.] Hustedt 1945 figs 42: 2, 3; Jurilj 1954; Krammer & Lange-Bertalot 1986 fig. 36: 1; Simonsen 1987 figs 509: 9–13; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 43: 1–5, 45: 1 676. Navicula stankovici Hust. 1945 Hustedt 1945 figs 42: 9–11; Jurilj 1954; Krammer & Lange-Bertalot 1986 figs 33: 1–3; Simonsen 1987 figs 509: 14–20; Miho 1998; Lange-Bertalot 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 41: 1–8 O 677. Navicula subalpina E. Reichardt 1988 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 46: 1–11, 47: 1,2; Pavlov 2010 figs 12: 10–15 O 678. Navicula cf. subalpina E. Reichardt 1988 Pavlov 2010 figs 11: 1–9 O 679. Navicula subhastatula Levkov & Metzeltin 2007* Levkov et al. 2007 figs 55: 1–17, 56: 1–5; Pavlov 2010 figs 12: 16–22 O/P 680. Navicula submuralis Hust. 1945 O/P [Sellaphora submuralis (Hust.) Lange-Bert. nom. invalid] Hustedt 1945 fig. 41: 37; Jurilj 1954; Krammer & Lange-Bertalot 1986 fig. 73: 12; Simonsen 1987 figs 508: 7–9; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 66: 18–26, 67: 4 681. Navicula subplacentula Hust. 1930 O [Placoneis subplacentula Hust. sensu Miho & Lange-Bertalot 2004, nom. invalid] Miho & Lange-Bertalot 2004 682. Navicula subrotundata Hust. 1945 O [Naviculadicta subrotundata (Hust.) Lange-Bert. nom. invalid] Hustedt 1945 figs 41: 30–35; Jurilj 1954; Krammer & Lange-Bertalot 1986 figs 73: 16–20; Simonsen 1987 figs 507: 26–35; Miho & Lange-Bertalot 2004, Kocev et al. 2010 683. Navicula subtilissima f. baicalensis Skvortsov & A. Meyer 1928 Petrovska & Stojanov 2007 O 684. Navicula subvasta Hust. 1935# Hustedt 1945 figs 41: 38–40; Čado 1965; Petrovska & Stojanov 2007 O 685. Navicula subviridula Levkov 2011* Levkov & Williams 2011 figs 18–24, 64–68 O 686. Navicula tenelloides Hust. 1937 Miho & Lange-Bertalot 2004 O DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 55 687. Navicula tripunctata (O.F.Müll.) Bory 1822 O [Navicula gracilis Ehrenb.] Hustedt 1945; Jurilj 1954; Čado 1965; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 32: 1–6, 33: 1–7; Petrovska & Stojanov 2007 688. Navicula trivialis Lange-Bert. 1980 Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 40: 15, 16, 48: 7–10 O/P 689. Navicula trophicatrix Lange-Bert. var. ? sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 690. Navicula turris Hust. 1936# Levkov et al. 2007 figs 49: 4–7 O 691. Navicula utermohlii Hust. 1943 O/P [Naviculadicta utermohlii (Hust.) Lange-Bert. nom. invalid] Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 66: 14–17 692. Navicula veneta Kütz. 1844 O [Navicula cryptocephala var. veneta (Kütz.) Grunow] Jurilj 1954 fig. 35d, e; Čado 1977; Miho & Lange-Bertalot 2004 693. Navicula viridula (Kütz.) Ehrenb. 1838 Hustedt 1945; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 63: 1–5 O 694. Navicula viridulacalcis Rumrich & Lange-Bert. 2000 Levkov et al. 2007 figs 63: 6–10 P 695. Navicula viridula (Kütz.) Ehrenb. var. ? sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 696. Navicula wildii Lange-Bert. 1993 Miho & Lange-Bertalot 2004 O 697. Navicula nov. spec. sensu Lange-Bert. 2001 Lange-Bertalot 2001 O 698. Navicula nov. spec. sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 699. Navicula nov. spec. (aff. antonii) sensu Miho & Lange-Bert. 2004 Miho & Lange-Bertalot 2004 O 700. Navicula sp. sensu Kozarov 1960 Kozarov 1960a O 701. Navicula sp. sensu Miho & Lange-Bert. 2003 Miho & Lange-Bertalot 2003 O 702. Navicula sp. sensu Levkov et al. 2007 Levkov et al. 2007 fig. 66: 27 703. Navicula sp. (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 42: 18–27 O/P O Family: Pleurosigmataceae Mereschk. 1903 PLEUROSIGMA W.Sm. 1852 704. Pleurosigma elongatum W. Sm. 1852 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 56 • Phytotaxa 45 © 2012 Magnolia Press O LEVKOV & WILLIAMS GYROSIGMA Hassall 1843 705. Gyrosigma acuminatum (Kütz.) Rabenh. 1853 Hustedt 1945; Jurilj 1954; Mitić 1998b, 1998c; Mitić & Patceva 1999b; Patceva 2001; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Petrovska & Stojanov 2007 706. Gyrosigma attenuatum (Kütz.) Rabenh. 1853 Hustedt 1945; Jurilj 1954 fig. 53a, b; Kozarov 1959, 1960b; Čado 1977; Kungulovski et al. 1987; Mitić et al. 1997; Miho 1998; Mitić 1998a; Miho & Lange-Bertalot 2004; Levkov et al. 2006c figs 15, 16; 2007 figs 125: 1, 2, 127: 1, 2; Petrovska & Stojanov 2007 O O/P 707. Gyrosigma distortum var. parkeri (M.B. Harrison) Cleve 1894 Hustedt 1945; Jurilj 1954 fig. 53c; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 708. Gyrosigma macedonicum Levkov, Krstic & Nakov 2006* Levkov et al. 2006c figs 2–14; 2007 figs 126: 1–4, 127: 3–8; Pavlov 2010 figs 19: 1–4 P 709. Gyrosigma sciotoense (Sull. & Wormley) Cleve 1894 O [Gyrosigma spencerii var. nodifera Hust.] [Gyrosigma nodiferum (Grunow) Reimer] Hustedt 1945; Levkov et al. 2006c figs 17, 18; 2007 figs 125: 3, 4; Petrovska & Stojanov 2007 710. Gyrosigma obtusatum (Sull. & Wormley) C.S. Boyer 1922 O/P [Gyrosigma scalproides (Rabenh.) Cleve] Hustedt 1945; Jurilj 1954; Levkov et al. 2006c figs 19–20; 2007 fig. 125: 6; Miho & LangeBertalot 2004 Family: Stauroneidaceae D.G. Mann 1990 STAURONEIS Ehrenb. 1843 711. Stauroneis anceps Ehrenb. 1843 Hustedt 1945; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 W 712. Stauroneis gracilis Ehrenb. 1843 Levkov et al. 2007 figs 109: 3, 4 W 713. Stauroneis gracilima Hust. 1943 Petrovska & Stojanov 2007 O 714. Stauroneis gracilior E. Reichardt 1995 Levkov et al. 2007 fig. 110: 1 W 715. Stauroneis lychnidis Jurilj 1954* Jurilj 1954 fig. 31d, e; Petrovska & Stojanov 2007 O 716. Stauroneis lapponica A. Cleve 1895 Hustedt 1945 O 717. Stauroneis phoenicenteron (Nitzsch) Ehrenb. 1843 O/W Hustedt 1945; Jurilj 1954 fig. 31a; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 109: 1–2; Petrovska & Stojanov 2007 718. Stauroneis producta Grunow 1880 Petrovska & Stojanov 2007 O 719. Stauroneis salina W. Sm. 1853 Miho & Lange-Bertalot 2004 O 720. Stauroneis separanda Lange-Bert. & Werum 2004 Levkov et al. 2007 figs 110: 15–17 W DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 57 721. Stauroneis smithii Grunow 1860 Hustedt 1945; Jurilj 1954 fig. 31b; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 110: 12–14; Petrovska & Stojanov 2007 P 722. Stauroneis cf. smithii Grunow 1860 Levkov et al. 2007 fig. 110: 11 P 723. Stauroneis smithii var. incisa Pant. 1902# Jurilj 1954 fig. 31c; Petrovska & Stojanov 2007 P 724. Stauroneis smithii var. elliptica Hust. 1945* O/W Hustedt 1945 figs 42: 34–36; Jurilj 1954; Simonsen 1987 figs 506: 42–46; Levkov et al. 2007 figs 110: 16–21; Petrovska & Stojanov 2007 CRATICULA Grunow 1868 725. Craticula ambigua (Ehrenb.) D.G. Mann 1990 O/P [Navicula cuspidata var. ambigua (Ehrenb.) Cleve] Hustedt 1945; Jurilj 1954 fig. 32b; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 82: 3, 4; Petrovska & Stojanov 2007 726. Craticula cuspidata (Kütz.) D.G. Mann 1990 O [Navicula cuspidata Kütz.] Hustedt 1945; Jurilj 1954 fig. 32a; Kungulovski et al. 1987; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 82: 1, 2; Petrovska & Stojanov 2007 Family: Proschkiniaceae D.G. Mann 1990 PROSHKINIA Karayeva 1978 727. Proschkinia bulnheimii (Grunow) Karajeva 1978 Miho & Lange-Bertalot 2004 O Order: Thalassiophysales D.G. Mann 1990 Family: Catenulaceae Mereschk. 1902 AMPHORA Ehrenb. 184431 728. Amphora affinis Kütz. 1844 O [Amphora ovalis var. affinis (Kütz.) Van Heurck] Petrovska & Stojanov 2007; Jurilj 1954 fig. 56c; Levkov 2009 figs 46: 1–12, 47: 1–9, 59: 14–21, 62: 12–14, 70: 13–21, 154: 3, 259: 1–5 729. Amphora aequalis Krammer 1980 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 730. Amphora brevis Levkov 2009 O [Amphora sp. (?nov.) 3 sensu Levkov et al. 2007, figs 164: 20–25] Levkov et al. 2007 figs 164: 20–25; Levkov 2009 figs 78: 21–18, 176: 4, 5, 195:5, 731. Amphora calumetica (Thomas) Perag. 1897 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 31. O This genus has been revised with misidentifications corrected by Levkov et al. (2009). 58 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 732. Amphora crawfordii Levkov 2009* O [Amphora sp. 1. sensu Jurilj 1954] [Amphora sp. (?nov). 1 sensu Levkov et al. 2007] Jurilj 1954 fig. 57a; Levkov et al. 2007 figs 162: 5, 6; Levkov 2009 figs 34: 1–7, 35: 1–6 733. Amphora aff. cruciffera A. Cleve 1932 Miho & Lange-Bertalot 2004 O 734. Amphora copulata (Kütz.) Schoeman & R.E.M. Archibald 1986 O/P [Amphora lybica Ehrenb. sensu Krammer & Lange-Bert. 1986 partim] Miho 1998; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 163: 1–3 735. Amphora cuneatiformis Levkov & Krstic 2009* Levkov 2009 figs 33: 9–21, 141: 1–5, 142: 1–4, 196: 4 O/P 736. Amphora inariensis Krammer 1980 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 163: 12–15; Levkov 2009 figs 60: 6–8, 78: 12–20, 150: 4, 192: 1–6, 196: 1 O/P 737. Amphora indistincta Levkov 2009* Levkov 2009 figs 56: 20, 21, 78: 29–38, 152: 3, 193: 1–6, 196: 3 O/P 738. Amphora micra Levkov 2009 O [Amphora pediculus (Kütz.) Grunow sensu Levkov et al. 2007] Levkov et al. 2007 figs 164: 1–13; Levkov 2009 figs 78: 1–11, 189: 1–5, 190: 1–5, 195: 2; Reed et al. 2010 739. Amphora neglectiformis Levkov & Edlund 2009 O/P [Amphora inariensis Krammer sensu Levkov et al. 2007, figs 163: 12–15] Levkov et al. 2007 figs 163: 12–15; Levkov 2009 figs 50: 1–13, 72: 9–13, 165: 1–5, 184: 1, 2, 5 740. Amphora ohridana Levkov 2007* Levkov et al. 2007 figs 160: 3, 161: 1–7; Levkov 2009 O 741. Amphora ovalis (Kütz.) Kütz. 1844 Fott 1933; Hustedt 1945; Jurilj 1954 fig. 55a, b; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 162: 1–4; Petrovska & Stojanov 2007 O/P 742. Amphora ovalis var. lata Levkov 2009* Levkov 2009 figs 3: 1–4, 4: 1–6, 122: 1, 2, 5; Pavlov 2010 figs 21: 1–3 O/P 743. Amphora ovalis var. tenuis Levkov 2009 Levkov 2009 figs 5: 1–10, 6: 1–10, 71: 16, 122: 3, 4, 127: 3 O/P 744. Amphora pediculus (Kütz.) Grunow 1880 O [Amphora ovalis var. pediculus Kütz.] Forti 1931; Hustedt 1945; Jurilj 1954 fig. 56a; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007, 164: 1–13; Petrovska & Stojanov 2007; Kocev et al. 2010; Naumoski & Mitreski 2010; Reed et al. 2010 745. Amphora prespanensis Levkov, Krstic & Metzeltin 2007* Levkov et al. 2007 figs 159: 1–9, 160: 1, 2; Levkov 2009 figs 36: 1–9, 143: 1–5 O/P 746. Amphora pseudaequalis Levkov 2009* O/P [Amphora aequalis Krammer sensu Levkov et al. 2007] [Amphora fogediana Krammer sensu Levkov et al. 2007, partim] Levkov et al. 2007 figs 163: 4–11, 160: 4, 5; Levkov 2009 figs 55: 1–17, 161: 4, 173: 1–6, 174: 1–5 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 59 747. Amphora pseudoeximia Levkov 2009* O [Amphora fogediana Krammer sensu Levkov et al. 2007 partim] Levkov et al. 2007 figs 164: 14–18; Levkov 2009 figs 45: 15–24, 159: 1–5, 160: 1–5, 195: 3 748. Amphora pseudominutissima Levkov 2009* Levkov 2009 figs 35: 7–18, 175: 1–5, 196: 2 O 749. Amphora pura Levkov 2009* O [Amphora sp. (?nov). 2 sensu Levkov et al. 2007] Levkov et al. 2007 figs 162: 7–9; Levkov 2009 figs 45: 1–14, 155: 1–5, 156: 1–3; Pavlov 2010 figs 22: 7–10 750. Amphora recens Levkov & Nakov 2009* Levkov 2009 figs 32: 1–10, 139: 1–4 O 751. Amphora recondita Levkov & Nakov 2009* Levkov 2009 figs 33: 1–8, 140: 1–6 O/P 752. Amphora sancti-naumii Levkov & Metzeltin 2007* O [Amphora sp. 2. sensu Jurilj 1954] Jurilj 1954 fig 57b; Levkov et al. 2007 figs 157: 1–7, 158: 1–6; Levkov 2009 figs 31: 1–10, 137: 1–6, 138: 1–4 753. Amphora subaequalis Levkov 2009* Levkov 2009 figs 35: 19–31, 161: 3, 176: 1–3 754. Amphora subconstricta Levkov 2009 O/P O [Amphora ovalis var. constricta Skvortsov] Petrovska & Stojanov 2007 755. Amphora transsylvanica Pant. 1892# Jurilj 1954 fig. 54; Čado 1974; Levkov et al. 2007 figs 156: 1–3; Petrovska & Stojanov 2007; Levkov 2009 figs 10: 1–5, 11: 1–6, 124: 1–4, 125: 1–6 O 756. Amphora vetula Levkov 2009* O [Amphora copulata (Kütz.) Schoeman & R.E.M. Archibald sensu Levkov et al. 2007] [Amphora ovalis var. elongata Jurilj] Jurilj 1954 fig. 56b; Levkov et al. 2007 figs 163: 1–3; Petrovska & Stojanov 2007; Levkov 2009 figs 49: 1–15; 157: 1–4; 158: 1–5; Pavlov 2010 figs 22: 1–6 HALAMPHORA (Cleve) Levkov 2009 757. Halamphora coffeaeformis (C. Agardh) Levkov 2009* O [Amphora coffeaeformis (C. Agardh) Kütz.] Petrovska & Stojanov 2007 758. Halamphora oligotraphenta (Lange-Bert. & Krammer) Levkov 2009 O [Amphora oligotraphenta Lange-Bert. & Krammer] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 759. Halamphora holsatica (Hust.) Levkov 200932 O [Amphora holsatica Hust.] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 760. Halamphora montana (Krasske) Levkov 2009 O [Amphora montana Krasske] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 32. This species is distributed in brackish to marine habitats and it is unlikely to be present in oligotrophic Lake Ohrid. 60 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 761. Halamphora normanii (Rabenh.) Levkov 2009 O/W [Amphora normani Rabenh.] Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 762. Halamphora parathumensis Levkov, Pavlov & Jovanovska 2009* [Cymbella thumensis (A. Mayer) Hustedt sensu Hustedt 1945 figs 42: 60–62] Hustedt 1945 figs 42: 60–62; Levkov 2009 figs 109: 19–35 O 763. Halamphora veneta (Kütz.) Levkov 2009 P [Amphora veneta Kütz.] Hustedt 1945; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 764. Halamphora spec. 3 (?nov) sensu Levkov 2009 Levkov 2009 figs 109: 18, 240: 1–6 O Order: Bacillariales Hendey 1937 Family: Bacillariaceae Ehrenberg 1831 BACILLARIA J.F. Gmel. 1791 765. Bacillaria paradoxa Gmelin 1791 Miho & Lange-Bertalot 2004 O DENTICULA Kütz. 1844 766. Denticula elegans Kütz. 1844 Petrovska & Stojanov 2007 O 767. Denticula tenuis Kütz. 1844 Hustedt 1945; Jurilj 1954; Stojanov 2007 O Čado 1977; Levkov et al. 2007 figs 195: 16–18; Petrovska & 768. Denticula tenuis var. crassula (Naegeli) Hust. 1930 Petrovska & Stojanov 2007 O 769. Denticula thermalis Kütz. 1844 Petrovska & Stojanov 2007 O GRUNOWIA Rabenh. 1864 770. Grunowia sinuata (Thwaites) Rabenh. 1864 O [Nitzschia sinuata Thwaites] Petrovska & Stojanov 2007 771. Grunowia solgensis (A. Cleve) Aboal 2003 O [Nitzschia interrupta (A. Reichelt) Hust [Nitzschia sinuata var. delognei (Grunow) Lange-Bert.] Hustedt 1945; Jurilj 1954 NITZSCHIA Hassall 1845 772. Nitzschia acicularis (Kütz.) W.Sm. 1853 Hustedt 1945; Jurilj 1954; Miho 1998 O 773. Nitzschia acidoclinata Lange-Bert. 1976 Miho & Lange-Bertalot 2004 O 774. Nitzschia acula Hantzsch 1862 O/P [Nitzschia acuta Hantzsch] DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 61 Jurilj 1954 fig. 76c; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 191: 4; Petrovska & Stojanov 2007 775. Nitzschia alpina Hust. 1943 Miho 1998; Miho & Lange-Bertalot 2004 O 776. Nitzschia amphibia Grunow 1862 Hustedt 1945; Jurilj 1954 fig. 77a, b; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 fig. 191: 9; Petrovska & Stojanov 2007 O/P 777. Nitzschia angustatula Lange-Bert. 1987 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 195: 5, 6; Petrovska & Stojanov 2007 O/P 778. Nitzschia balcanica Hust. 1945 Hustedt 1945 figs 43: 4, 5; Jurilj 1954; Simonsen 1987 figs 515: 1–11 O 779. Nitzschia bryophila (Hust.) Hust. 1943 Levkov et al. 2007 figs 193: 14, 15 O 780. Nitzschia brunoi Lange-Bert. 1996 Levkov et al. 2007 figs 195: 1–3; Pavlov 2010 figs 24: 1–4 P 781. Nitzschia capitellata Hust. 1922 Hustedt 1945; Petrovska & Stojanov 2007 O 782. Nitzschia communis Rabenh. 1860 Levkov et al. 2007 figs 193: 16–23 P 783. Nitzschia closterium (Ehrenb.) W. Sm. 1853 Noveska 1994 O 784. Nitzschia denticula Grunow 1880 Miho & Lange-Bertalot 2004 O 785. Nitzschia dissipata (Kütz.) Grunow 1862 Hustedt 1945; Jurilj 1954; Kozarov 1959; Miho & Lange-Bertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 192: 26–28; Petrovska & Stojanov 2007 O 786. Nitzschia dissipata var. media (Hantzsch) Grunow 1881 Miho & Lange-Bertalot 2004 O 787. Nitzschia distans W. Greg. 1857 Petrovska & Stojanov 2007 O 788. Nitzschia filiformis (W.Sm.) Van Heurck 1896 Miho & Lange-Bertalot 2004 O 789. Nitzschia fonticola Grunow 1879 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004 O/W 790. Nitzschia frustulum (Kütz.) Grunow 1880 Petrovska & Stojanov 2007 O 791. Nitzschia frustulum var. perpusilla (Rabenh.) Grunow 1881 Hustedt 1945; Jurilj 1954; Petrovska & Stojanov 2007 O 792. Nitzschia gisela Lange-Bert. 1987 Levkov et al. 2007 figs 192: 1–11 O 793. Nitzschia graciliformis Lange-Bert. & Simonsen 1978 Miho & Lange-Bertalot 2004; Shumka & Miho 2005 O 794. Nitzschia gradifera Hust. 1945 Kungulovski et al. 1987 W 62 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 795. Nitzschia gracilis Hantzsch 1860 Kungulovski et al. 1987 W 796. Nitzschia granulata Grunow 1880 Miho & Lange-Bertalot 2004 O 797. Nitzschia heufleriana Grunow 1862 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 191: 3 O 798. Nitzschia inconspicua Grunow 1862 Miho & Lange-Bertalot 2004 O 799. Nitzschia intermedia Hantzsch 1880 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 193: 24; Petrovska & Stojanov 2007 800. Nitzschia kuetzingiana Hilse 1860 Jurilj 1954 fig. 77c O/P O 801. Nitzschia lacuum Lange-Bert. 1980 Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 193: 11 O/P 802. Nitzschia liebetruthii var. major Cleve & J.D. Möller 1879 Miho & Lange-Bertalot 2004 O 803. Nitzschia cf. liebetruthii Rabenh. 1864 Miho & Lange-Bertalot 2004 O 804. Nitzschia linearis (C. Agardh) W.Sm. 1853 Hustedt 1945; Jurilj 1954; Patceva 2001; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 191: 6–8; Petrovska & Stojanov 2007 805. Nitzschia lorenziana Grunow 1880 O/P O [Nitzschia lorenziana var. subtilis Grunow] Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 806. Nitzschia macedonica Hust. 1945* Hustedt 1945 figs 43: 6–12; Jurilj 1954; Simonsen 1987 figs 513: 19–24; Mann & Droop 1996; Levkov et al. 2007 figs 192: 12–23, 193: 12 O 807. Nitzschia palea (Kütz.) W.Sm. 1856 Hustedt 1945; Jurilj 1954; Miho 1998; Shumka & Miho 2005; Levkov et al. 2007 figs 193: 28– 31; Petrovska & Stojanov 2007 O/P 808. Nitzschia palea var. debilis (Kütz.) Grunow 1880 Miho & Lange-Bertalot 2004 O 809. Nitzschia palea var. tenuirostris Grunow 1881 Petrovska & Stojanov 2007 O 810. Nitzschia paleacea Grunow 1881 Jurilj 1954 fig. 77d; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 193: 9, 10 O/P 811. Nitzschia perminuta (Grunow) Perag. 1903 Levkov et al. 2007 fig. 193: 13 O/P 812. Nitzschia radicula Hust. 1942 Levkov et al. 2007 figs 193: 32–34 P 813. Nitzschia recta Hantzsch 1861 Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 192: 26–28; Petrovska & Stojanov 2007; Pavlov 2010 figs 23: 1–6 814. Nitzschia scalpelliformis Grunow 1880 Miho & Lange-Bertalot 2004 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA O/P O Phytotaxa 45 © 2012 Magnolia Press • 63 815. Nitzschia sigmoidea (Nitzsch) W.Sm. 1853* Hustedt 1945; Jurilj 1954; Kozarov 1959, 1960a; Mitić 1987, 1993 1998a,b,c; Miho 1998; Noveska 1994; Mitić et al. 1997; Mitić & Patceva 1999b; Patceva 2001; Levkov et al. 2007 figs 191: 1, 2; Petrovska & Stojanov 2007 O 816. Nitzschia solita Hust. 1953 Levkov et al. 2007 fig. 191: 9 O 817. Nitzschia speciosa Hust. 1945*33 Hustedt 1945 figs 43: 1–3; Jurilj 1954; Simonsen 1987 figs 514: 1–4; Krammer & LangeBertalot 1997 figs 5: 1, 2 O 818. Nitzschia spinifera Levkov, Metzeltin & Krstic 2006* Levkov et al. 2006b figs 25–34; 2007 figs 194: 1–12 O 819. Nitzschia stagnorum Rabenh. 1860 Hustedt 1945; Jurilj 1954 O 820. Nitzschia subacicularis Hust. 1922 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 193: 1–8 O/P 821. Nitzschia sublinearis Hust. 1921 Levkov et al. 2007 fig. 193: 25 O/P 822. Nitzschia subtilis (Kütz.) Grunow 1880 Petrovska & Stojanov 2007 O 823. Nitzschia umbonata (Ehrenb.) Lange-Bert. 1978 O/P [Nitzschia thermalis (Ehrenb.) Auersw.] Hustedt 1945; Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 193: 26, 27 824. Nitzschia vermicularis (Kütz.) Hantzsch 1860 Čado 1971, 1977; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 191: 5 O/P 825. Nitzschia wuellerstorffii Lange-Bert. 1987 Miho & Lange-Bertalot 2004 O 826. Nitzschia sp. 1 sensu Pavlov 2010 Pavlov 2010 figs 24: 5–13 O HANTZSCHIA Grunow 1877 827. Hantzschia abundans Lange-Bert. 1993 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 195: 13, 14; Petrovska & Stojanov 2007 O/P 828. Hantzschia amphioxys (Ehrenb.) Grunow 1880 Hustedt 1945; Jurilj 1954 fig. 75b, c, d; Čado 1971, 1977; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 195: 15; Petrovska & Stojanov 2007 O 829. Hantzschia amphioxys f. capitata Ö.Müll. 1909 Petrovska & Stojanov 2007 O 830. Hantzschia amphioxys var. maior Grunow 1881 Jurilj 1954 fig. 75e O/P 831. Hantzschia elongata (Hantzsch) Grunow 1880 Jurilj 1954; Petrovska & Stojanov 2007 33. O This species was considered by Krammer & Lange-Bertalot (1997) to be a synonym of N. sigmoidea. However, differences in valve and frustule morphology are considered significant enough to retain both species. 64 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS TRYBLIONELLA W. Sm. 1853 832. Tryblionella angustata W. Sm. 1853 O [Nitzschia angustata (W. Sm.) Grunow] Hustedt 1945; Jurilj 1954 fig. 76a, b; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 fig. 195: 4 833. Tryblionella angustata var. acuta (Grunow) Bukht. 1995 O [Nitzschia angustata var. acuta Grunow] Hustedt 1945; Jurilj 1954 834. Tryblionella apiculata W. Greg. 1857 O [Nitzschia constricta (Kütz.) Ralfs] Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 195: 12 835. Tryblionella calida (Grunow) D.G. Mann 1990 P [Nitzschia calida Grunow] Levkov et al. 2007 figs 195: 7–9 836. Tryblionella hungarica (Grunow) Freng. 1942 P [Nitzschia hungarica Grunow] Levkov et al. 2007 fig. 195: 11 837. Tryblionella scutellum W. Sm. 1853 O [Nitzschia circumsuta (Bailey) Grunow] Miho & Lange-Bertalot 2004 838. Tryblionella levidensis W. Sm. 1856 P [Nitzschia levidensis (W. Sm.) Grunow] Levkov et al. 2007 fig. 195: 10 Order: Rhopalodiales D.G. Mann 1990 Family: Rhopalodiaceae (Karsten) Topachevskyj & Oksiyuk 1960 RHOPALODIA O. Müll. 1895 839. Rhopalodia gibba (Ehrenb.) O.Müll. 1895 O/P [Epithemia gibba (Ehrenb.) Kütz.] Beck 1904; Hustedt 1945; Jurilj 1954; Miho 1998 fig. 2: 15; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 199: 8, 9; Petrovska & Stojanov 2007 840. Rhopalodia gibba var. minuta Krammer 1987 Miho 1998; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 841. Rhopalodia gibba var. ventricosa (Kütz.) H. & M. Perag. 1900 O [Epithemia ventricosa Kütz.] Beck 1904 842. Rhopalodia musculus (Kütz.) O.Müll. 1899 Jurilj 1954 fig. 75a; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O EPITHEMIA Bréb. ex Kütz. 1844 843. Epithemia adnata (Kütz.) Bréb. 1838 O/P [Epithemia zebra (Ehrenb.) Kütz.] DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 65 Hustedt 1945; Jurilj 1954 figs 72b, c, d, e, f, 73a; Čado 1971, 1977; Miho 1998; Miho & LangeBertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 198: 16–19; Petrovska & Stojanov 2007, Reed et al. 2010 844. Epithemia adnata var. porcellus (Kütz.) R.M. Patrick 1975 O [Epithemia zebra var. porcellus (Kütz.) Grunow] Hustedt 1945; Jurilj 1954 845. Epithemia adnata var. proboscidea (Kütz.) Hendey 1954 Levkov 2010 W 846. Epithemia adnata var. saxonica (Kütz.) R.M. Patrick 1975 O [Epithemia zebra var. saxonica (Kütz.) Grunow] Hustedt 1945; Jurilj 1954 fig. 73b; Petrovska & Stojanov 2007 847. Epithemia argus (Ehrenb.) Kütz. 1844 O/P/W [Epithemia argus var. longicornis Grunow] [Epithemia ocellata (Ehrenb.) Kütz.] Jurilj 1954 fig. 72a; Kungulovski et al. 1987; Levkov et al. 2007 fig. 199: 6; Petrovska & Stojanov 2007 848. Epithemia fracta (Jurilj) Levkov 2007* O [Epithemia zebra var. fracta Jurilj] Jurilj 1954 fig. 74a; Levkov et al. 2007; Petrovska & Stojanov 2007 849. Epithemia goeppertiana Hilse 1860 Miho & Lange-Bertalot 2004; Levkov et al. 2007 O 850. Epithemia hyndmanni W. Sm. 1850 Jurilj 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 197: 1–5; Petrovska & Stojanov 2007 O 851. Epithemia lunata Jurilj 1954* Jurilj 1954 fig. 70a, b; Miho 1998; Levkov et al. 2003a fig. 1: 10; Levkov et al. 2007 figs 196: 1–8; Petrovska & Stojanov 2007 O 852. Epithemia lunata var. obesa Jurilj 1954 Jurilj 1954 fig. 71a, b, c, d; Petrovska & Stojanov 2007 O 853. Epithemia muelleri Fricke 1904 Jurilj 1954; Čado 1977 O 854. Epithemia ohridana Levkov & Metzeltin 2007* Levkov et al. 2007 figs 198: 1–12, Reed et al. 2010; Pavlov 2010 figs 25: 1–10 O 855. Epithemia sorex Kütz. 1844 O/P/W Petkov 1910; Hustedt 1945; Jurilj 1954; Miho 1998 fig. 1: 7; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 198: 13–15; Petrovska & Stojanov 2007 856. Epithemia turgida (Ehrenb.) Kütz. 1844 O/P/W Beck 1904; Petkov 1910; Hustedt 1945; Jurilj 1954 fig. 74b, c; Kozarov 1960a; Čado 1977; Kungulovski et al. 1987; Miho 1998; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 199: 7; Petrovska & Stojanov 2007 857. Epithemia turgida var. granulata (Ehrenb.) Brun 1880 Kungulovski et al. 1987; Levkov et al. 2007 figs 199: 5 858. Epithemia turgida var. westermannii (Ehrenb.) Grunow 1862 Petkov 1910 66 • Phytotaxa 45 © 2012 Magnolia Press W O/P LEVKOV & WILLIAMS 859. Epithemia sp. sensu Petkov 1910 P [Cystopleura species sensu Petkov 1910] Petkov 1910 Order: Surirellales D.G. Mann 1990 Family: Entomoneidaceae Reimer 1975 ENTOMONEIS Ehrenb. 1845 860. Entomoneis alata (Ehrenb.) Ehrenb. 1845 Miho & Lange-Bertalot 2004 O Family: Surirellaceae Kütz. 1844 CAMPYLODISCUS Ehrenb. 1840 861. Campylodiscus chadoi Jerkovic 1971* Jerkovic 1971a figs 4–10 O 862. Campliodiscus echinatus Jurilj 1949* Jurilj 1949 fig. 22; 1954; Levkov et al. 2007 figs 209: 3, 4; Petrovska & Stojanov 2007 O 863. Campylodiscus echeneis Ehrenb. 1840 Miho & Lange-Bertalot 2004 O 864. Campylodiscus hibernicus Ehrenb. 1845 O/P [Campylodiscus noricus var. hibernicus (Ehrenb.) Grunow] Jurilj 1954 fig. 84a, b; 1949 fig. 24a, b; Levkov et al. 2007 figs 209: 5, 6; Petrovska & Stojanov 2007 865. Campylodiscus hibernicus var. transsylvanicus Pant. 1892# O [Campylodiscus hibernicus var. transsylvanicus (Pant.) Jurilj] [Campylodiscus pervulsus Jurilj] Jurilj 1949 fig. 17; 1954; Jerkovic 1972 figs 4: 4–6, 5: 5 866. Campylodiscus juriljii Jerkovic 1971* Jerkovic 1971a figs 1–3 O 867. Campylodiscus levanderi Hust. 1925 O/P [Scoliodiscus costatus (Jurilj) Jurilj] [Plagiodiscus costatus Jurilj] Hustedt 1945 figs 38: 8, 9. Jurilj 1949 fig. 15a, b,, 1954, 1956a; Jerkovic 1971b fig. 2: 2; Jerkovic 1972 figs 2: 3–6, 3: 1–4, 4–1–3; Jerkovic 1976 figs 3, 4; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 207: 5 868. Campylodiscus noricus Ehrenb. 1841 Hustedt 1945; Jurilj 1949; Jurilj 1954 figs 82, 83; Kozarov 1959, 1960b; Miho 1998; Patceva 2001; Levkov et al. 2007 figs 208: 1, 2; Petrovska & Stojanov 2007 O/P 869. Campylodiscus marginatus Jurilj 1949* Jurilj 1949 fig. 19, 1954; Levkov et al. 2007 figs 209: 1, 2; Petrovska & Stojanov 2007 O/P 870. Campylodiscus marginatus var. rudis Jurilj 1949* Jurilj 1949 fig. 21, 1954; Levkov et al. 2007 figs 208: 5, 6; Petrovska & Stojanov 2007 O 871. Campylodiscus marginatus var. tenuis Jurilj 1949* Jurilj 1949 fig. 20, 1954 fig. 85; Jerkovic 1972 figs 5: 1–4, 6: 1–2 O 872. Campylodiscus striatus Jurilj 1949* Jurilj 1949 fig. 23, 1954; Jerkovic 1972 figs 6: 3–5 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA O/P Phytotaxa 45 © 2012 Magnolia Press • 67 873. Campylodiscus spinosus Jurilj 1949* Jurilj 1949 fig. 18, 1954; Levkov et al. 2007 figs 210: 1–6; Petrovska & Stojanov 2007 874. Campylodiscus sp. (?nov.) sensu Levkov et al. 2007 Levkov et al. 2007 figs 211: 1–8 O/P P CYMATOPLEURA W.Sm. 1851 875. Cymatopleura acutiformis Levkov & Nakov 2007* Levkov et al. 2007 figs 202: 3–6 O/P 876. Cymatopleura brunii P. Petit ex Brun 1895 Petrovska & Stojanov 2007 877. Cymatopleura elliptica (Bréb.) W.Sm. 185134 Petkov 1910; Hustedt 1945; Jurilj 1954; Čado 1977; Kungulovski et al. 1987; Miho 1998 fig. 2: 14; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 202: 1, 2; Petrovska & Stojanov 2007 878. Cymatopleura solea (Bréb.) W.Sm. 185135 O O/P O/P [Cymatopleura solea var. regula (Ehrenb.) Grunow] [Cymatopleura solea var. vulgaris F. Meister 1912] Petkov 1910; Hustedt 1945; Jurilj 1954; Čado 1977; Kungulovski et al. 1987; Miho 1998 fig. 2: 13; Mitić 1998a,b,c; Mitić & Patceva 1999b; Mitić et al. 2000b; Patceva 2001; Miho & LangeBertalot 2003, 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 200: 2–6; Petrovska & Stojanov 2007 879. Cymatopleura solea var. apiculata (W.Sm.) Ralfs 1861 Jurilj 1954 fig. 78; Kozarov 1960a; Levkov et al. 2007 fig. 200: 1; Petrovska & Stojanov 2007 880. Cymatopleura solea var. obtusata Jurilj 1949* Jurilj 1949 figs 1a,b, 2, 3, 1954; Levkov et al. 2003a fig. 2: 1; Levkov et al. 2007 figs 201: 1–5; Petrovska & Stojanov 2007 O/P O STENOPTEROBIA Bréb. 1878 881. Stenopterobia delicatissima (F.W. Lewis) Bréb. ex Van Heurck 1896 O [Surirella delicatissima F.W. Lewis] Jurilj 1954 SURIRELLA Turpin 1828 882. Surirella angusta Kütz. 1844 Hustedt 1945; Jurilj 1954; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 203: 1; Petrovska & Stojanov 2007 O/P 883. Surirella bifrons Ehrenb. 1843 O/P [Surirella biseraita var. bifrons (Ehrenb.) Hust.] [Surirella biseriata var. bifrons f. punctata Meister] Hustedt 1945; Jurilj 1954 fig. 80a, b; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 204: 1–6; Petrovska & Stojanov 2007 34. Populations of Cymatopleura elliptica from Lake Prespa and Ohrid differ from type specimens (e.g. Krammer & Lange-Bertalot 1997: figs 119: 1–4) in valve outline (having almost parallel sides) and valve width (34–41 µm in C. elliptica vs. 51–63 µm in the Lake Ohrid population). Further observations are necessary to establish the identity of the Lake Ohrid specimens. 35. There are several size classes of C. solea in Lake Ohrid, which most likely represent different entities. 68 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 884. Surirella birostrata Hust. 1912 Levkov et al. 2007 figs 203: 7–13 P 885. Surirella biseriata Bréb. 1836 Hustedt 1945; Jurilj 1954 fig. 79b; Jerkovic 1972 figs 1: 1–5; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 205: 3; Petrovska & Stojanov 2007 O/P 886. Surirella biseriata var. constricta (Grunow) Hust. 1912 Petrovska & Stojanov 2007 O 887. Surirella brebissonii Krammer & Lange-Bert. 1987 Petrovska & Stojanov 2007 O 888. Surirella brebissonii var. kuetzingii Krammer & Lange-Bert. 1987 Kungulovski et al. 1987; Levkov et al. 2007 figs 203: 5, 6 P/W 889. Surirella costata Jurilj 1949* O [Surirella cincta Jurilj] Jurilj 1949 fig. 7a, b, 1954; Petrovska & Stojanov 2007 890. Surirella didima Kütz. 1844 Petrovska & Stojanov 2007 O 891. Surirella gracilis (W. Sm.) Grunow 1862 Levkov et al. 2007 fig. 205: 2 O 892. Surirella helisela (Jurilj) Jurilj 1954* O [Helissella glabra Jurilj] Jurilj 1949 figs 8, 9; Jurilj 1954; Jurilj 1956b fig. 2: 3, Krammer & Lange-Bertalot 1997 fig. 169: 4 893. Surirella helvetica Brun 1880 O/P [Surirella linearis var. helvetica (Brun) F. Meister] Jurilj 1954 fig. 80c; Čado 1977; Kungulovski et al. 1987; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 206: 12; Petrovska & Stojanov 2007 894. Surirella iconella (Jurilj) Jurilj 1954* O [Iconella variabilis Jurilj] Jurilj 1949 figs 10, 11, 1954, 1956 fig. 2: 1; Jerkovic 1972 fig. 1: 6 895. Surirella imbuta Jurilj 1949* Jurilj 1949 fig. 4a, b, 1954 fig. 79a; Krammer & Lange-Bertalot 1997 figs 169: 1–3; Levkov et al. 2007 fig. 207: 4; Petrovska & Stojanov 2007 O 896. Surirella linearis W.Sm. 1853 Jurilj 1954; Mitić 1998a; Mitić & Patceva 1999b; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 205: 4, 206: 8, 9; Petrovska & Stojanov 2007 O/P 897. Surirella linearis var. constricta Grunow 1862 Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 206: 10, 11; Petrovska & Stojanov 2007 O 898. Surirella lineopunctata Jurilj 1949* O/P [Surirella biseriata var. lineopunctata Jurilj] Jurilj 1949 fig. 6, 1954; Miho & Lange-Bertalot 2004; Levkov et al. 2007 fig. 205: 1; Petrovska & Stojanov 2007 899. Surirella minuta Bréb. 1849 O/P/W [Surirella ovata Kütz.] [Surirella ovata var. pinnata (W.Sm.) Hust.] [Surirella ovata var. minuta (Bréb.) Brun] Hustedt 1945; Jurilj 1954 fig. 81c, d; Kozarov 1959; Kungulovski et al. 1987; Mitić 1998a,c; Patceva 2001; Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 203: 2–4; Petrovska & Stojanov 2007 DIATOMS (BACILLARIOPHYTA) FROM LAKES OHRID & PRESPA Phytotaxa 45 © 2012 Magnolia Press • 69 900. Surirella nervosa (A. Schmidt) A. Mayer 1919 O [Surirella tenera var. nervosa A.Schmidt] Petrovska & Stojanov 2007 901. Surirella ovalis Bréb. 1838 Miho & Lange-Bertalot 2004 O 902. Surirella robusta Ehrenb. 1841 Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 O 903. Surirella rotunda Jurilj 1949* Jurilj 1949 fig. 5, 1954; Petrovska & Stojanov 2007 O 904. Surirella spiralis Kütz. 1844 O/P/W [Spirodiscus spiralis (Kütz.) Jurilj] [Spirodiscus obesus Jurilj 1954] Petkov 1910; Jurilj 1949 fig. 12a, b, 1954, 1956b figs 2: 4, 5; Čado 1977; Miho & LangeBertalot 2004; Levkov et al. 2007 figs 207: 1–3; Petrovska & Stojanov 2007 905. Surirella splendida (Ehrenb.) Kütz. 1844 O [Surirella robusta var. splendida (Ehrenb.) Van Heurck] Hustedt 1945; Jurilj 1954; Kozarov 1959, 1960a; Miho & Lange-Bertalot 2004; Petrovska & Stojanov 2007 906. Surirella striatula Turpin 1828 Miho & Lange-Bertalot 2004 O 907. Surirella terricola Lange-Bert. & Alles 1996 Miho & Lange-Bertalot 2004 O 908. Surirella sp. (?nov) sensu Levkov et al. 2007 Levkov et al. 2007 figs 206: 1–7 P SCOLIODISCUS Jurilj 1954 909. Scoliodiscus echinatus (Jurilj) Jurilj 1954* O [Plagiodiscus echinatus Jurilj] Jurilj 1949 fig. 14a, b, 1954 910. Scoliodiscus glaber (Jurilj) Jurilj 1954* O [Plagiodiscus glaber Jurilj] Jurilj 1949 fig.13a, b, 1954; Jerkovic 1972 figs 2: 1, 2 KLINODISCUS Jurilj 1949 911. Klinodiscus obliquus Jurilj 1949* Jurilj 1949 fig. 16a, b, 1954 O Incertae sedis EOLIMNA Lange-Bert. & W. Schiller 1997 912. Eolimna minima (Grunow). Lange-Bert. 1998 O/P [Navicula minima Grunow] [Naviculadicta minima (Grunow) Lange-Bert. nom. invalid] Hustedt 1945; Jurilj 1954; Kozarov 1960a; Mitić 1998a,b; Miho & Lange-Bertalot 2004; Shumka & Miho 2005; Levkov et al. 2007 figs 66: 28, 29, 67: 5; Petrovska & Stojanov 2007 70 • Phytotaxa 45 © 2012 Magnolia Press LEVKOV & WILLIAMS 913. Eolimna tantula (Hust.) Lange-Bert. 2004 O [Navicula tantula Hust.] Hustedt 1945; Jurilj 1954; Mitić 1998a,b 914. Eolimna sp Miho & Lange-Bertalot 2004; Levkov et al. 2007 figs 67: 3, 69: 6 O HYGROPETRA Krammer & Lange-Bert. in Krammer 2000 915. Hygropetra balfouriana (Grunow) Krammer & Lange-Bert. 2000 Levkov et al. 2007 fig. 188: 10 W KRSTICIELLA Levkov 2007 916. Krsticiella ohridana Levkov 2007* Levkov et al. 2007 figs 154: 1–16, 155: 1–5 O MAYAMEA Lange-Bert. 1997 917. Mayamaea atomus (Kütz.) Lange-Bert. 1997 O [Naviculadicta atomus (Kütz.) Lange-Bert. nom.invalid] Miho & Lange-Bertalot 2004; Shumka & Miho 2005 PULCHELLA Krammer 2000 918. Pulchella obsita (Hust.) Lange-Bert. 2004 O [Navicula obsita Hust.] Hustedt 1945 fig. 41: 2; Simonsen 1987 figs 508: 32–34; Werum & Lange-Bertalot 2004 figs 79: 5–9 PRESTAURONEIS Bruder 2008 919. 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