Parent taxon: Poromyida according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Coan et al. 2000, Hickman 2014 and Nevesskaja 2009
Sister taxa: Parilimyoidea, Poromyoidea, Verticordioidea
Subtaxa: Cuspidariidae Halonymphidae Protocuspidariidae Spheniopsidae
Ecology: facultatively mobile infaunal carnivore
Distribution:
• Quaternary of Costa Rica (1 collection), Ecuador (1), Mayotte (2), Panama (1), United States (8: California, Florida), Uruguay (1)
• Pliocene to Pleistocene of Malaysia (6)
• Pliocene of Belgium (2), Costa Rica (3), the Dominican Republic (2), Haiti (1), Holy See (Vatican City State) (1), Italy (1), Jamaica (6), Japan (2), the Netherlands (1), Pakistan (2), Panama (4), the United Kingdom (1), United States (1: Florida), Venezuela (1)
• Miocene to Pliocene of South Africa (1)
• Miocene of Australia (1), Belgium (1), Denmark (2), the Dominican Republic (17), Germany (7), Italy (2), Japan (1), the Netherlands (2), New Zealand (1), Panama (2), Poland (1), Slovakia (1), Somalia (2), United States (5: Florida), Venezuela (2)
• Oligocene to Miocene of the Russian Federation (1)
• Oligocene of Austria (1), Denmark (4), Hungary (1), the Netherlands (1), Panama (1), the Russian Federation (8), United States (18: Mississippi, Washington)
• Eocene of Belgium (1), Egypt (3), Indonesia (1), New Zealand (3), the Russian Federation (1), Spain (1), the United Kingdom (2), United States (27: Alabama, California, Louisiana, Mississippi, New Jersey, Oregon, Texas, Washington)
• Paleocene of Argentina (1), Australia (3), Belgium (2), Denmark (6), Germany (1), Greenland (1), India (1), Mexico (1), Poland (1), the Russian Federation (1), United States (15: California, Texas)
• Cretaceous of Antarctica (1), Austria (1), Canada (3: Alberta, Saskatchewan), China (1), Colombia (1), Denmark (2), Egypt (1), Germany (4), Greenland (1), India (1), Israel (1), Kazakhstan (1), Libya (1), Poland (9), the Russian Federation (2), Ukraine (1), United States (87: Alabama, Arizona, Colorado, Delaware, Georgia, Maryland, Mississippi, Montana, New Jersey, North Dakota, South Carolina, South Dakota, Texas, Wyoming)
• Jurassic of Germany (3), Hungary (2), Japan (2), Kenya (1), Portugal (4), the United Kingdom (2), United States (1: California)
• Triassic of China (1), Hungary (1), Italy (2), Japan (3)
Total: 343 collections including 423 occurrences