Order Monalithistida Lagneau-Hérenger 1955 (demosponge)
Parent taxon: Lithistida according to R. M. Finks et al. 2004
Sister taxa: Achrochordonia, Anomocladina, Bothoteca, Callipelta, Cupulina, Gillettia, Hippalimus, Homophymia, Lithistida wiedeyi, Megalithistida, Orchocladina, Phymatellidae, Psarodictyon, Pyrogochonia, Scleritodermidae, Spirosclerophorida, Tetralithistida
Subtaxa: Megarhizomorina Sphaerocladina
Ecology: stationary epifaunal suspension feeder