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1994, Hydrobiologia
Troglocyclops janstocki is proposed to accommodate cyclopids from Hatchet Bay Cave, Eleuthera Island, Bahamas. The species is the most primitive member of the Halicyclopinae because of the presence of 15-segmented antennules, mandibular palp reduced to 3 setae, one of them quite long and plumose, a bisegmented maxillary endopodite, and 3 segments in the maxilliped endopodite. These copepods possess the first pediger still distinct, being partially enclosed dorsally and laterally by a carapace-like extension of the posterior margin of the dorsal cephalic shield. This latter character represents a plesiomorphic state shared with the primitive cyclopinids and, within the Cyclopidae, only with the Euryteinae. The new taxon is the only known species of Halicyclopinae having two apical spines on the terminal segment of the exopodite of legs 2 to 4, and the intercoxal sclerites of the legs 1 and 2 sexually dimorphic. The phylogenetic importance of each of these characters is discussed.
1998 •
Abstract Halicyclops cenoticola sp. nov. is described from cenotes of the Yucatan Peninsula, Mexico. The new species shares exclusively with H. caridophilus and H. tetracanthus the presence of 2 inner setae on the leg 5 exopod in the males. As far as is known, the new species is distinguished trom all its congeners in having the dorsal caudal seta as long as the outer middle caudal seta; legs 2 and 3 are dimorphic concerning the structure of the 3 inner setae on the terminal endopodal segment; and leg 6 of both the male and female consists of only 2 elements. An identification key for the Halicyclops species known trom the Caribbean Region, the Gulf of Mexico, Bermuda, and the coast of French Guiana is included.
2000 •
2015 •
Teratocyclops cubensis Pleşa, 1981 (Copepoda, Cyclopidae) is redescribed on the basis of spec-imens deposited in the collection of the Speleological Institute “Emil Racovitza”, Cluj, Romania. The genus TeratocyclopsPleşa, 1981 is rede ned, mainly characterized by the following characters of the female: the general habitus of the body, the 11-segmented antennule, the presence of the ves-tigial exopodite on the antenna, the segmentation of the swimming legs, the structure of the distal segment of the endopoditeof leg P4 with 1 spine and 3 setae, and the proximal segment of leg 5 fused to the somite. The relationship to the closely related genera MetacyclopsKiefer, 1927, Apocyclops Lindberg, 1942, and GoniocyclopsKiefer, 1955 are discussed. RÉSUMÉ
2014 •
Plankton samples obtained from the lagoon system Laguna Navío Quebrado, in northern Colombia, yielded male and female specimens of an undescribed cyclopoid copepod of the genus Halicyclops. The new species belongs to the highly diverse and widely distributed thermophilus-complex. It closely resembles Halicyclopsclarkei Herbst, 1982 from Louisiana and Halicyclopsbowmani Rocha & Iliffe, 1993 from Bermuda. These species share the same armature of P1-P4EXP3, with a 3443 spine formula and the terminal antennary segment with 5 setae. However, Halicyclopsgaviriai sp. n. can be separated from both Halicyclopsclarkei and Halicyclopsbowmani by the morphology of the anal pseudoperculum, the proportions of the fourth antennulary segment, the length of the inner basipodal spine of P1, the P1EXP/inner basipodal spine inner length ratio and the length/width ratio of the caudal rami. This is the third species of Halicyclops recorded from Colombia and the first one described from this country. With ...
Sarsia: North Atlantic Marine Science
New epacteriscids (Copepoda, Calanoida) from anchialine caves in the Bahamas2004 •
isara solutions
ग्रामीण-नगरीय प्रवसनप्रवसन को प्रवास, प्रवजन, देशान्तर तथा पलायन आदि नामों से जाना जाता है। प्रवसन अवधारणात्मक दृष्टि से किसी व्यक्ति अथवा परिवार सहित रोजी-रोजगार के लिए एक स्थान से दूसरे स्थान पर गमन को कहते हैं। प्रवसन जनसंख्या वृद्धि तथा रोजगार के अवसरोेें की अनुपलब्धता का परिणाम है। प्रवसन प्रायः चार प्रकार का होता है- ग्रामीण-ग्रामीण, ग्रामीण-नगरीय, नगरीय-नगरीय तथा नगरीय ग्रामीण।
Advances in Atmospheric Sciences
Seasonal and extraseasonal predictions of summer monsoon precipitation by gems(1)1997 •
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Pelatihan Digital Marketing
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