Genus Eucyclops Claus, 1893

Shared characters among species

Females. Prosome widest at end of cephalosome and second pediger. Urosome fivesegmented, slightly elongated. First urosomal somite with long setules on lateral margin. Posterior margin of anal somite with row of spinules; anal somite as long as preanal somite. Inner margin of caudal rami naked. Terminal setae of caudal ramus plumose. Antennules 12- segmented with finely denticulated hyaline membrane on segments 10 – 12. Third swimming leg with small spinules along insertion of basipodite (frontal surface).

Males. More slender than female, with urosome six-segmented. Antennules 16-segmented in examined species.