†subfamily Opinae Chavan 1952 (clam)
Bivalvia - Carditida - Astartidae
PaleoDB taxon number: 61505
Parent taxon: Astartidae according to J. G. Carter et al. 2011
Sister taxa: Alleinacin, Astartellinae, Astartinae, Astartoides, Astartopsis, Balantioselena, Digitaria, Ensio, Eriphylinae, Goodallia, Lirotarte, Lyapinella, Middalya, Nargunella, Oxyeurax, Permartella, Pinzonellinae, Praeconia, Pressastarte, Radiastarte, Taxocardia, Terraiinae, Trigonopinae, Woodia
Subtaxa: Coelopis, Opis, Opisoma, Seebachia, Trigonastarte, Trigonopis
Ecology: facultatively mobile infaunal suspension feeder