†family Fissispongiidae Finks and Rigby 2004 (demosponge)
Parent taxon: Agelasida according to J. K. Rigby et al. 2009
Sister taxa: Aphrosalpingidae, Astroscleridae, Auriculospongiidae, Catenispongiidae, Cliefdenellidae, Columnocoelia, Cryptocoeliidae, Exotubispongiidae, Girtyocoeliidae, Glomocystospongiidae, Guadalupiidae, Intrasporeocoeliidae, Madonia, Maeandrostiidae, Olangocoeliidae, Palermocoeliidae, Parastylothalamiidae, Pharetrospongiidae, Preperonidellidae, Radiotrabeculoporidae, Sestrostomellidae, Sphaeropontiidae, Spicidae, Stellispongiellidae, Tataouinella, Thaumastocoeliidae, Virgolidae
Subtaxa: Fissispongia
Ecology: stationary epifaunal suspension feeder