Archaeocyatha - Ajacicyathida - Ajacicyathidae
Full reference: R. Bedford and J. Bedford. 1939. Development and classification of Archaeos (Pleospongia). Kyancutta Museum, Memoirs 6:67-82
Parent taxon: Bronchocyathoidea according to F. Debrenne et al. 2015
See also Kerner et al. 2011
Sister taxa: Bipallicyathidae, Bronchocyathidae, Densocyathidae, Ethmocyathidae, Sajanocyathidae
Subtaxa: Ajacicyathus Davidicyathus Dentatocyathus Iljinicyathus Kisasacyathus Nochoroicyathus Orbicyathellus Orbicyathus Robustocyathellus Rotundocyathus Sibirecyathus Stapicyathus Turgorocyathus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Cambrian of Antarctica (3 collections), Australia (10), Canada (4: British Columbia, Yukon), China (7), Italy (3), Kyrgyzstan (1), Mexico (5), Mongolia (14), Morocco (10), the Russian Federation (133), Spain (7), United States (2: California, Nevada)
Total: 199 collections including 713 occurrences