†Opis Defrance 1824
Bivalvia - Carditida - Astartidae
Alternative spelling: Astarte (Opis)
Parent taxon: Opinae according to H. E. Vokes 1980
Sister taxa: Coelopis, Opisoma, Seebachia, Trigonastarte, Trigonopis
Subtaxa: Opis (Coelopis), Opis (Trigonopis), Opis corallina, Opis rosarioensis