Archaeocyatha - Archaeocyathida
Parent taxon: Archaeocyathina according to F. Debrenne et al. 2015
See also Kerner et al. 2011
Sister taxa: Beltanacyathoidea, Dictyocyathoidea, Metacyathoidea, Naimarkcyathoidea, Tabellaecyathoidea, Warriootacyathoidea
Subtaxa: Archaeocyathidae Archaeopharetridae Archaeosyconidae
Type: Archaeocyathus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Ordovician of China (1 collection)
• Cambrian of Antarctica (3), Australia (14), Canada (19: British Columbia, Newfoundland and Labrador, Northwest Territories, Yukon), China (8), Falkland Islands (Malvinas) (1), France (1), Germany (4), Italy (13), Mexico (9), Mongolia (9), Morocco (20), the Russian Federation (90), Spain (7), United States (18: California, Nevada, New Jersey, Virginia)
• Delamaran of Canada (1: British Columbia), United States (1: Idaho)
Total: 219 collections including 417 occurrences