Archaeocyatha - Ajacicyathida - Ethmocyathidae
Parent taxon: Bronchocyathoidea according to F. Debrenne et al. 2015
See also Kerner et al. 2011
Sister taxa: Ajacicyathidae, Bipallicyathidae, Bronchocyathidae, Densocyathidae, Sajanocyathidae
Subtaxa: Afiacyathus Baikalocyathus Carpicyathus Degeletticyathus Ethmocyathus Frinalicyathus Gnaltacyathus Hyptocyathus Inessocyathellus Inessocyathus Mackenziecyathus Rasetticyathus Terraecyathus Ussuricyathellus Zonacyathellus
Type: Ethmocyathus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Cambrian of Antarctica (1 collection), Australia (3), Canada (5: British Columbia, Northwest Territories, Yukon), China (5), Falkland Islands (Malvinas) (1), France (1), Germany (2), Italy (10), Kazakhstan (1), Mongolia (6), Morocco (20), the Russian Federation (46), Spain (4), United States (2: Nevada)
Total: 107 collections including 179 occurrences