Family Ptychomyinae Keen 1969
Bivalvia - Carditida - Crassatellidae
Alternative spelling: Ptychomyidae
Parent taxon: Crassatellidae according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Nevesskaja 2009 and Vokes 1980
Sister taxa: Anthonya, Crassatellinae, Eucrassatella, Incatina, Pachythaerus, Scambulinae, Spissatella
Subtaxa: Ptychomya
Distribution:
• Cretaceous of Argentina (26 collections), Chile (4), France (2), Italy (1), Japan (7), Mexico (1), Switzerland (2), Tanzania (2), Trinidad and Tobago (1), the United Kingdom (1)
• Jurassic of Chile (2), Mexico (1), United States (1: Texas)
Total: 51 collections including 53 occurrences