Bivalvia - Actinodontida - Cycloconchidae
Parent taxon: Anodontopsoidea according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Cox et al. 1969, Nevesskaja 2009, Newell 1965, Sánchez 2001 and Vokes 1980
Sister taxa: Actinodontidae, Anodontopsidae, Baidiostracidae, Intihuarellidae, Redoniidae
Subtaxa: Actinodonta Ananterodonta Carminodonta Catamarcaia Celtoconcha Copidens Cycloconcha Cycloconchinae Famatinadonta Fasciculodonta Fortowensia Poladonta Taselasmodinae
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Miocene of Japan (1 collection)
• Eocene of United States (2: Colorado, Oregon)
• Clarkforkian of United States (2: Wyoming)
• Paleocene of United States (25: Colorado, Montana, North Dakota, Wyoming)
• Givetian of Canada (1: Northwest Territories)
• Devonian of Canada (4: Northwest Territories, Nunavut)
• Dobrotivian of Czechia (1), France (3), Spain (1)
• Whitlandian of the United Kingdom (3)
• Arenig of Argentina (5), China (1), France (3), the United Kingdom (1)
• Ordovician of Argentina (2), Australia (6), China (5), Czechia (10), Spain (1), the United Kingdom (8), United States (11: Indiana, Kentucky, Ohio)
Total: 96 collections including 112 occurrences