Parent taxon: Solemyida according to E. V. Coan and P. Valentich-Scott 2012
See also Bieler and Mikkelsen 2006, Bouchet et al. 2010, Carter et al. 2011, Coan et al. 2000, Mikkelsen and Bieler 2008 and Nevesskaja 2009
Sister taxon: Solemyoidea
Subtaxa: Manzanellidae Nucinellidae
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of the Philippines (1 collection), United States (6: California, Florida)
• Pliocene of Belgium (3), Ecuador (1), Italy (1), Panama (1), the United Kingdom (2), United States (1: Florida)
• Miocene of Germany (1), Japan (1), Panama (2), United States (3: Florida, Vermont)
• Oligocene of Colombia (1), Germany (1)
• Eocene to Oligocene of Japan (1)
• Eocene of Belgium (2), France (1), Germany (1), the Russian Federation (1), the United Kingdom (2), United States (2: Louisiana, Oregon)
• Paleocene of Denmark (2), France (1)
• Cretaceous of Japan (2), New Zealand (1), Svalbard and Jan Mayen (5), United States (1: California)
• Jurassic of Germany (26), Italy (1), Svalbard and Jan Mayen (3), the United Kingdom (8)
• Triassic of Italy (1), the Russian Federation (1), Svalbard and Jan Mayen (2), United States (1: Oregon)
• Permian of United States (11: Arizona, Nevada, New Mexico)
Total: 101 collections including 102 occurrences