Bivalvia - Actinodontida - Cycloconchidae
Parent taxon: Anodontopsoidea according to J. G. Carter et al. 2011
See also Bouchet et al. 2010, Cope 1996, Cox et al. 1969, Nevesskaja 2009, Newell 1965, Sánchez 2001, Vokes 1980 and Wang et al. 2025
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)
• Paleocene of United States (27: 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 (16), Czechia (10), Spain (1), the United Kingdom (8), United States (11: Indiana, Kentucky, Ohio)
Total: 107 collections including 129 occurrences