Family Phymatellidae Schrammen 1910 (demosponge)
Demospongiae - Lithistida - Phymatellidae
Parent taxon: Lithistida according to M. Kelly and J. S. Buckeridge 2005
Sister taxa: Achrochordonia, Anomocladina, Bothoteca, Callipelta, Cupulina, Gillettia, Hippalimus, Homophymia, Lithistida wiedeyi, Megalithistida, Monalithistida, Orchocladina, Psarodictyon, Pyrogochonia, Scleritodermidae, Spirosclerophorida, Tetralithistida
Subtaxa: none
Ecology: stationary epifaunal suspension feeder
Distribution: found only at CH/f63a Tutuiri Stream, Chatham Island (Paleocene to Eocene of New Zealand)