†family Densocyathidae Vologdin 1937 (archaeocyath sponge)
Archaeocyatha - Ajacicyathida - Densocyathidae
Parent taxon: Bronchocyathoidea according to F. Debrenne et al. 2015
Sister taxa: Ajacicyathidae, Bipallicyathidae, Bronchocyathidae, Ethmocyathidae, Sajanocyathidae
Subtaxa: Angustocyathus Cadniacyathus Dailycyathus Deceptioncyathus Densocyathus Khirgisocyathus Leptosocyathellus Leptosocyathus Natalijaecyathus Rectannulus Tennericyathus
Type: Densocyathus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Cambrian of Antarctica (1 collection), Australia (4), China (3), Italy (1), Kyrgyzstan (1), Mongolia (6), Morocco (2), the Russian Federation (38), Spain (3)
Total: 59 collections including 74 occurrences