Bivalvia - Carditida - Crassatellidae
Alternative spelling: Hybolophus
Full reference: R. B. Stewart. 1930. Gabb's California Cretaceous and Tertiary type lamellibranchs. The Academy of Natural Sciences of Philadelphia Special Publication 3:1-314
Parent taxon: Eucrassatella according to M. C. Perrilliat 1992
See also Sepkoski 2002, Stewart 1930 and Woodring 1982
Sister taxa: Eucrassatella (Eucrassatella), Eucrassatella ampla, Eucrassatella aphrodina, Eucrassatella decipiens, Eucrassatella eupontica, Eucrassatella kingicoloides, Eucrassatella marshalli, Eucrassatella maudensis, Eucrassatella montserratensis, Eucrassatella oblonga, Eucrassatella pulchra, Eucrassatella rostrata, Eucrassatella scopalveus, Eucrassatella wilckensi
Subtaxa: Eucrassatella (Hybolophus) berryi Eucrassatella (Hybolophus) elassa Eucrassatella (Hybolophus) trinitaria Eucrassatella (Hybolophus) venezuelana Hybolophus disenum Hybolophus fluctuatus Hybolophus gibbosus Hybolophus granti Hybolophus maleficae Hybolophus nelsoni Hybolophus subgibbosa Hybolophus terrestris
Type: Crassatella gibbosa
Distribution:
• Quaternary of Costa Rica (1 collection), Panama (1), United States (8: California)
• Pliocene of Colombia (1), Costa Rica (2), United States (3: California), Venezuela (2)
• Miocene to Pliocene of United States (1: California)
• Miocene of Colombia (38), Ecuador (3), Mexico (1), Panama (23), Peru (3), Trinidad and Tobago (4), United States (25: California), Venezuela (8)
• Oligocene to Miocene of United States (2: California)
• Oligocene of Peru (1), United States (4: California)
Total: 131 collections including 133 occurrences