†class Archaeocyatha Vologdin 1937 (sponge)
Parent taxon: Porifera according to S. M. Rowland 2001
Sister taxa: Calcarea, Caliculospongia, Clathrispongia, Coronacollina, Cotyliscus, Cuneiphycus, Cyathophyscus, Cyclospongia, Demospongea, Disjectoporidae, Drosdovia, Eocoryne, Glenodictyum, Heteractinida, Hexactinellida, Holocoelia, Matthewcyathus, Megalelasma, Microcoryne, Mussooriella, Nabaviella, Nostrocyathus, Oligoplagia, Phymoraphinia, Polyactinellidae, Scyphia, Shitangspongia, Sinoflabrum, Solactiniella, Stromatoporoidea, Tragos, Trammeria
Subtaxa: Adaecyathus, Cryptaporocyathus, Irregulares, Ramuscyathus, Regulares
Ecology: stationary intermediate-level epifaunal suspension feeder