SARSIA A NEW SPECIES OF HALICYCLOPS (COPEPODA, CYCLOPOIDA, CYCLOPIDAE) FROM CENOTES OF THE YUCATAN PENINSULA, MEXICO, WITH AN IDENTIFICATION KEY FOR THE SPECIES OF THE GENUS FROM THE CARIBBEAN REGION AND ADJACENT AREAS

A new species of Halicyclops (Copepoda, Cyclopoida, Cyclopidae) from cenotes of the Yucatan Peninsula, Mexico, with an identification key for the species of the genus from the Caribbean region and adjacent areas. – Sarsia 83:387-399. Bergen. ISSN 0036-4827. 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 from 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 from the Caribbean Region, the Gulf o