Females: MdEnp with 4 setae gradually increasing in length from innermost to outermost; Mx1Li2 and Le1 absent. More characters can be accessed by backtracking the key: Page 1243
Males: P2 Exp3 with 3 outer spines. More characters can be accessed by backtracking the key: Page 1258
Kingdom Animalia Phylum Crustacea Class Maxillopoda Subclass Copepoda Order Cyclopoida Family Oithonidae Genus Oithona Species Oithona fallax
