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1995, Journal of Micropalaeontology
2003 •
Il Naturalista Siciliano
Italian Brackish and Marine Ostracod Fauna2013 •
In the literature, there are many studies concerning ostracods in the Italian seas. Among the most relevant are the evergreen monograph of M\ufcller (1894) about the ostracods from the Gulf of Naples, the publications of BONADUCE et al., 1976 and BREMAN,1976 about the Adriatic Sea, PURI et al., 1964, again about the Gulf of Naples and BONADUCE et al., 1977 about the southern Tyrrhenian Sea. In addition, different authors centered their research in smaller areas of the Italian coasts (MONTENEGRO et al., 1998; SCIUTO & ROSSO, 2002; ARBULLA et al., 2004; SCIUTO, in progress;) proposed a synthesis of the most abundant and more easily identifiable ostracods from the Italian shelves, linking their occurrence to some environmental factors such as bathymetry and substrate. Ten different ostracod assemblages were observed in relation to the type of substrate, and nine bathymetric assemblages were detected. Evident changes of the autochthonous ostracod fauna were recorded at 50-60 m, 90-100 m and 125-150 m, corresponding to the infralittoral-circalittoral, inner-middle circalittoral and middle-outer circalittoral boundaries respectively. More recently, AIELLO & BARRA (2010) have published a checklist of the Italian marine ostracods, reporting 377 ostracod species from the screening of 84 papers. In this contribution, we present an updated database of the ostracod species pertaining to the infralittoral and circalittoral zones, together with those occurring in lagoon, intertidal, submarine cave and deep water settings. Furthermore, we intend to highlight the links between the ostracod assemblages..
A total of twenty-two surface sediment samples collected through SSK-35 from the coastal region along the northwestern part of the Bay of Bengal were provided to carry out a preliminary study on the distribution of ostracoda. The ostracoda taxa were separated from the sediments applying standard micropaleontolgical techniques, their distribution in individual sample examined and environmental interpretation made. Twenty one species belonging to 18 genera have been identi ed. Out of these Echinocythereis species, Cytherelloidea leroyi and Keijia demissa are well represented in the samples. From the occurrence and distribution of the ostracod assemblage, it is inferred that the sediments are deposited in a tropical, shallow, inner shelf environment. In the present work, the ratio between the carapaces and open valves has been taken into consideration for determining the comparative rate of sedimentation in the study area. Out of the twenty two samples, as many as 607 ostracod shells were recovered. Among these, 90% specimens were open valves and the remaining 10% were complete carapace. The distribution of carapaces and open valves in the samples of the Bay of Bengal shows that comparatively a slow rate of sedimentation may have prevailed in the locations of study areas of the Bay, probably under normal oxygenated environmental conditions. The ostracod specimens are white to light yellow in colour with a couple of predated species and no pyrite deposit in the ostracoda shells.
2000 •
2007 •
Ostracods successfully inhabit almost all types of aquatic environment, from deep oceans to brackish water lagoons, estuaries and even freshwater streams, lakes, etc. The major controlling factors governing ostracod population and distribution in estuarine environments and continental shelf zones are water temperature, salinity and substrate. In this paper, the distribution and ecology of marine ostracoda in relation to the environmental parameters such as temperature, salinity, dissolved oxygen of the bottom waters, organic matter, and CaCO3, along with the sand-silt-clay ratio of sediments from the inner shelf sediment region off Karikkattukuppam (near Chennai), off Rameswaram, off Tuticorn and Andaman Islands is discussed. Additionally, similar studies on the brackish water ostracods from the Adyar estuary, Pitchavaram mangroves and Tamiraparani estuary have also been presented. The work pertaining to the statistical parameters of ostracoda such as carapace/valve ratio, ornamenta...
Thirty seven surface sediment samples collected through a multi-corer in seven transects of ORV Sagar Kanya, SK 308 Leg-1 from off central Bay of Bengal (shelf to slope environment) were analysed for living and dead Ostracoda. The samples, which ranged in water depth from ~29 m to 2540 m, yielded a total of 46 species belonging to 32 genera. The ostracod fauna of the Bay of Bengal exhibit a depth-related distribution that is controlled by substrate and hydrographic conditions. Sandy substrates of shallow water depth (~28 m) are characterized by Propontocypris sp. and Cytherelloidea malaccaensis. These species are replaced by Neonesidea cracenticlavula and Bairdoppilata paraalcyonicola in high population, which shows positive linear correlation with salinity, temperature and Total Calcium Carbonate (TCC) in the outer shelf ~55–73 m. Paijenborchella sp. dominates at ~763 m in the bathypelagic zone, giving way to Parakrithella sp. at greater depths of ~2540 m on soft-bottom substrates. The fauna represents an interesting mixture of displaced species and others known from bathyal and abyssal depths in the Bay of Bengal, including some pandemic deep sea species. The ostracod faunal diversity is higher in shallower water than in the deeper water, which may be due to the optimum temperature, pH, salinity and sub-strate. The fauna are comprised of three associations (Shelf/Upper Slope; Slope; Lower Slope/Abyss). A marked faunal turnover occurs at the outer-shelf. Factor Analysis was performed to determine the correlation of water and sediment parameters with the ostracod species. This study provides a detailed account of bathymetry and ostracod biodiversity recorded in the study area.
Journal of Paleolimnology
I. Karanovic: Recent Freshwater Ostracods of the World: Crustacea, Ostracoda, Podocopida2013 •
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