Order Sigmatosclerophorida Burton 1956 (demosponge)
Demospongiae - Sigmatosclerophorida
Parent taxon: Ceractinomorpha according to R. M. Finks et al. 2004
Sister taxa: Halisarcida, Medfraspongia, Vaceletida, Verongida
Subtaxa: Dystactospongiidae
Ecology: stationary epifaunal suspension feeder
Distribution: