Amsterdam Expeditions to the West Indian Islands, Report 40. Hesperocyclops improvisus n. g., n. sp., ein neuer Cyclopoide (Crustacea, Copepoda) von den Westindischen Inseln

In certain wells on the islands Antigua and Guadeloupe (West Indies), females and males of a new species of Cyclopidae were found, apparently belonging to an undescribed genus, for which the name Hesperocyclops improvisus n. g., n. sp., is proposed. The systematic position of this taxon is near Apocyclops Lindberg, 1942, but there are some morphological distinctions, e.g. in the shape of the genital somite and of the anal operculum in both sexes, in the different reduction of the 4th endopodite in females and males, and in the shape of P5. These developments may be considered an evolutionary step in the direction of the morphology of Haplocyclops Kiefer, 1952 (according to Dussart, 1982, a subgenus of Bryocyclops Kiefer, 1927).