†Cliefdenospongia Rigby and Webby 1988 (demosponge)
Demospongea - Megalithistida - Saccospongiidae
Full reference: J. K. Rigby and B. D. Webby. 1988. Late Ordovician sponges from the Malongulli Formation of central New South Wales, Australia. Palaeontographica Americana 56:1-147
Parent taxon: Saccospongiidae according to R. M. Finks et al. 2004
Sister taxa: Eochaunactis, Epiplastospongia, Haplistionella, Rugospongia, Saccospongia
Subtaxa: Cliefdenospongia lamina
Type: Cliefdenospongia lamina
Ecology: stationary epifaunal suspension feeder