†subfamily Cassianoidinae Newell and Boyd 1995 (scallop)
Bivalvia - Pectinida - Heteropectinidae
Alternative spelling: Cassianoididae
Full reference: N. D. Newell and D.W. Boyd. 1995. Pectinoid bivalves of the Permian-Triassic crisis. Bulletin of the American Museum of Natural History 227:1-95
Parent taxon: Heteropectinidae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010 and Newell and Boyd 1995
Sister taxa: Etheripectininae, Girtypectininae, Heteropectininae
Subtaxa: Cassianoides
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Australia (1 collection), Greece (1), Mexico (1), Nepal (5), Peru (3), the Russian Federation (2), Svalbard and Jan Mayen (1), United States (19: Texas, Wyoming)
Total: 33 collections each including a single occurrence