Female anal somite much narrower than Gns and cylinder-shaped; setae on A2 B and C only slightly differing in length; P4Enp with 1 long and 1 rudimentaryseta. Male Ur of 1 somite; P4Enp with only 1 seta. More characters can be accessed by backtracking the key: Page 1324
Kingdom Animalia Phylum Crustacea Class Maxillopoda Subclass Copepoda Order Poecilostomatoida Family Corycaeidae Genus Corycaeus Subgenus Urocorycaeus Species Corycaeus longistylis