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), Eritrea (1), French Polynesia (1), Japan (1), Kenya (4), Mozambique (1), Namibia (3), the Seychelles (5), South Africa (4), Sudan (1), 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: 56 collections including 66 occurrences