Parent taxon: Poromyida according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Coan et al. 2000 and Nevesskaja 2009
Sister taxa: Cuspidarioidea, Parilimyoidea, Poromyoidea
Subtaxa: Euciroidae Lyonsiellidae Verticordiidae
Ecology: facultatively mobile infaunal carnivore
Distribution:
• Quaternary of Costa Rica (2 collections), United States (9: California, Florida, North Carolina)
• Pliocene of Belgium (2), Costa Rica (1), the Dominican Republic (5), Ecuador (1), Holy See (Vatican City State) (1), Jamaica (5), Mexico (1), Panama (10), United States (3: North Carolina, South Carolina), Venezuela (1)
• Miocene to Pliocene of the Dominican Republic (2)
• Miocene of Australia (1), the Dominican Republic (13), Germany (4), Italy (3), New Zealand (1), Pakistan (1), Panama (4), United States (3: Florida), Venezuela (1)
• Oligocene of Denmark (1), Peru (1), Romania (1), United States (23: Mississippi)
• Eocene of Australia (1), New Zealand (2), Peru (1), the United Kingdom (2), United States (57: Alabama, Louisiana, Mississippi, North Carolina, Texas)
• Paleocene of Denmark (7), United States (7: Alabama, Texas)
• Cretaceous of Denmark (2)
Total: 179 collections including 199 occurrences