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New hypogean cyclopoid copepods (Crustacea) from the Yucatán Peninsula, Mexico

In: Bijdragen tot de Dierkunde
Authors:
Frank Fiers Invertebrate Section Royal Belgian Institute of Natural Sciences Vautierstraat 29 B-1000 Brussels Belgium

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Janet W. Reid Department of Invertebrate Zoology, MRC-163 National Museum of Natural History, Smithsonian Institution Washington DC 20560 U.S.A.

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Thomas M. Iliffe Department of Marine Biology Texas A&M University Galveston Texas 77553-1675 U.S.A

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Eduardo Suárez-Morales ECOSUR, El Colegio de la Frontera Sur - Unidad Chetumal Apdo Postal 424 Chetumal Q. Roo 77000 Mexico

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Four previously unknown hypogean species of cyclopoid copepods were collected in cenotes and wells of the Yucatán Peninsula, Mexico. Diacyclops chakan sp. n. and D. puuc sp. n. differ from their congeners in combining 3-segmented swimming legs, 11-segmented antennules, and legs 1–4 endopodite segment 2 all with 2 setae. Species of Diacyclops rarely occur in tropical regions, and the Diacyclops described here are only the second and third species recorded from Mexico. The benthic D. puuc was found in the large underground reservoir of a cenote. Diacyclops chakan was encountered in such large open subterranean water basins, but more frequently and abundantly in wells.

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