Parent taxon: Arcoidea according to R. Bieler and P. M. Mikkelsen 2006
See also Beu et al. 1990, Bouchet et al. 2010, Coan et al. 2000, Devries 2019, Dockery 1982, Nevesskaja 2009, Newell 1965, Rosenberg 2005, Todd 2001, Vokes 1980, Ward 1992 and Ward and Blackwelder 1987
Sister taxa: Arcidae, Catamarcaiidae, Cucullaeidae, Frejidae, Glycymerididae, Parallelodontidae
Subtaxa: Arcopsis Incanopsis Noetia
Ecology: facultatively mobile epifaunal suspension feeder
Distribution:
• Quaternary of Angola (2 collections), Australia (1), Bermuda (1), Brazil (4), Costa Rica (4), Cuba (1), the Dominican Republic (1), Ecuador (4), Japan (5), Mayotte (2), Mexico (5), Pakistan (1), Panama (4), United States (86: Florida, Georgia, Louisiana, Maryland, Massachusetts, Mississippi, New Jersey, New York, North Carolina, South Carolina, Virginia), Uruguay (1)
• Pliocene to Pleistocene of Malaysia (3), United States (1: Florida)
• Pliocene of Australia (2), Colombia (4), Costa Rica (10), the Dominican Republic (1), Ecuador (4), India (1), Indonesia (9), Jamaica (4), Japan (2), Pakistan (4), Panama (5), the Philippines (1), Trinidad and Tobago (15), United States (25: Florida, North Carolina, South Carolina, Virginia), Venezuela (3)
• Miocene to Pliocene of Indonesia (1)
• Miocene of Austria (1), Brazil (1), Bulgaria (4), Colombia (5), the Dominican Republic (2), Ecuador (10), Greece (2), India (3), Indonesia (1), Pakistan (2), Panama (13), Papua New Guinea (2), Peru (2), Poland (2), Trinidad and Tobago (8), United States (10: Florida, Maryland), Venezuela (5)
• Oligocene to Miocene of United States (1: Florida)
• Oligocene of Japan (1)
• Eocene of Australia (3), Colombia (1), France (1), India (1), Japan (2), Namibia (1), Nigeria (4), Peru (2), United States (1: California)
• Paleocene of Belgium (1), Denmark (7), France (1), Poland (2), Puerto Rico (1), United States (1: Texas)
• Cretaceous of Denmark (2), Germany (1), Jordan (1), United States (3: Texas)
Total: 328 collections including 373 occurrences