Parent taxon: Gymnoglossa according to L. W. Ward and B.W. Blackwelder 1987
See also Adegoke 1977, Hickman 1980, Kosnik 2002, Petuch 1992, Saul 1988, Sohl 1964 and Squires 1984
Sister taxa: Crepidulacea, Volutacea
Ecology: epifaunal carnivore
Distribution:
• Quaternary of Australia (4 collections), Djibouti (1), French Polynesia (1), Japan (1), Kenya (4), Mozambique (1), Namibia (3), the Seychelles (5), South Africa (4), United States (7: Hawaii), Vanuatu (2)
• Pliocene to Pleistocene of Guam (1)
• Pliocene of Costa Rica (1), Indonesia (2), Northern Mariana Islands (1), Vanuatu (1)
• Miocene of Argentina (2), Chile (4), Costa Rica (1), Indonesia (1), the Marshall Islands (1)
• Oligocene to Miocene of Argentina (1)
• Oligocene of Argentina (2)
• Eocene of Indonesia (1)
• Paleocene of Belgium (1), Mexico (1)
Total: 54 collections including 64 occurrences