†order Hemidiscosa Schrammen 1924 (glass sponge)
Parent taxon: Amphidiscophora according to R. M. Finks and J.K. Rigby 2004
See also Sepkoski 2002
Sister taxa: Amphidiscosa, Hyalonematidae, Reticulosa
Subtaxa: Hemidiscellidae Microhemidisciidae
Ecology: stationary epifaunal suspension feeder
Distribution: found only at Campaleo outcrop (Permian of Brazil)