Females: P3 Exp3 with 3 serrate spines on outer margin; MdEnp with 5 setae; Mx1 with well developed Li4 armed with 1 seta. More characters can be accessed by backtracking the key: Page 1239
Males: Md B with 2 similar spinulose spines on distal end. More characters can be accessed by backtracking the key: Page 1265
Kingdom Animalia Phylum Crustacea Class Maxillopoda Subclass Copepoda Order Cyclopoida Family Oithonidae Genus Oithona Species Oithona robusta
