†Aruntacyathus Kruse and West 1980 (sponge)
Parent taxon: Irregulares according to J. M. Kennard 1991
Sister taxa: Archaeocyathida, Batchatocyathus, Batenevia, Bicyathus, Cornutocyathus, Egiinocyathus, Graphoscyphia, Kazakhstanicyathida, Osadchiites, Palmericyathellus, Retilamina, Rhizacyathus
Subtaxa: none
Ecology: stationary intermediate-level epifaunal suspension feeder