Gastropoda - Opisthobranchia - Retusidae
Parent taxon: Philinoidea according to J. A. Todd 2001
See also Beesley 1998, Harzhauser and Kowalke 2002 and Wienrich and Janssen 2007
Sister taxa: Aglajidae, Cylichnidae, Gastropteridae, Philinidae, Philinoglossidae, Scaphandridae
Subtaxa: Retusa Rhizorus Sulcoretusa Volvulella
Ecology: epifaunal carnivore
Distribution:
• Quaternary of Australia (4 collections), Canada (2: New Brunswick, Nunavut), Costa Rica (2), Greenland (4), Italy (1), Jamaica (1), Japan (2), Mayotte (3), the Netherlands (3), Panama (1), Poland (4), Portugal (2), South Africa (2), the United Kingdom (7), United States (15: California, Florida, Louisiana, Virginia)
• Pliocene to Pleistocene of Malaysia (7)
• Pliocene of Belgium (2), Costa Rica (5), Italy (1), Jamaica (3), Japan (1), Mexico (2), Panama (17), Trinidad and Tobago (1), United States (3: California, Florida), Vanuatu (1), Venezuela (5)
• Miocene of Algeria (1), Argentina (2), Australia (6), Austria (2), Belgium (7), Brazil (2), Costa Rica (3), Denmark (1), the Dominican Republic (5), Germany (43), Haiti (1), Hungary (1), Iran (3), Italy (4), Kazakhstan (1), the Netherlands (2), New Zealand (2), Panama (32), Trinidad and Tobago (1), United States (32: California, Florida, Maryland, Oregon)
• Oligocene to Miocene of United States (1: Florida)
• Oligocene of Belgium (3), France (12), United States (5: Mississippi)
• Eocene of Belgium (3), Jamaica (1), Mexico (4), Pakistan (3), Panama (3), the United Kingdom (9), United States (280: Alabama, Arkansas, California, Louisiana, Mississippi, Oregon, South Carolina, Texas, Washington)
• Paleocene of Argentina (1), Denmark (5), Greenland (2), United States (50: Alabama, California, Louisiana, Maryland, Texas)
• Cretaceous of Argentina (2), Spain (1), United States (8: Alabama, California, Colorado, Georgia, Mississippi)
• Jurassic of Germany (1), Israel (3), Poland (1)
Total: 650 collections including 880 occurrences