Gastropoda - Sorbeoconcha - Vitrinellidae
Alternative spelling: Ponocyclus
Parent taxon: Cyclostremiscus according to J. A. Todd 2001
See also Ladd 1966, Perrilliat 1972, Sepkoski 2002 and Weisbord 1962
Sister taxa: Cyclostremiscus (Cyclostremiscus), Cyclostremiscus bartschi, Cyclostremiscus beauii, Cyclostremiscus petiti, Cyclostremiscus puntagordensis, Cyclostremiscus suppressus
Subtaxa: Cyclostremiscus (Ponocyclus) domingensis Cyclostremiscus (Ponocyclus) guppyi Cyclostremiscus (Ponocyclus) pentagonus
Ecology: epifaunal
Distribution:
• Quaternary of Costa Rica (1 collection), Panama (1), United States (8: Florida, Louisiana)
• Pliocene of Costa Rica (2), Indonesia (1), Jamaica (3), Mexico (3), Panama (4), Trinidad and Tobago (1), Venezuela (2)
• Miocene of Indonesia (5), the Marshall Islands (1), Palau (1), Panama (18), Trinidad and Tobago (6), Venezuela (1)
Total: 58 collections including 60 occurrences