Order Megalithistida Finks and Rigby 2004 (demosponge)
Full reference: R.M. Finks and J.K. Rigby. 2004. Paleozoic demosponges. Treatise on Invertebrate Paleontology E revised(3):9-173
Parent taxon: Lithistida according to R. M. Finks et al. 2004
See also Finks and Rigby 2004
Sister taxa: Achrochordonia, Anomocladina, Bothoteca, Callipelta, Cupulina, Gillettia, Hippalimus, Homophymia, Lithistida wiedeyi, Monalithistida, Orchocladina, Phymatellidae, Psarodictyon, Pyrogochonia, Scleritodermidae, Spirosclerophorida, Tetralithistida
Subtaxa: Helomorina Megamorina
Ecology: stationary epifaunal suspension feeder