†family Agelasidae Verrill 1907 (demosponge)
Demospongiae - Axinellida - Agelasidae
Parent taxon: Axinellida according to R. M. Finks et al. 2004
Sister taxa: Astrosclerida, Axinellidae, Ceratoporellidae, Cladocoropsidae, Cylicoopsis, Heftastylis, Neuroporidae, Pamirostroma, Pantokratoria, Syringostrominidae, Zlambachella
Subtaxa: Ropalospongia
Ecology: stationary epifaunal suspension feeder-photosymbiotic
Distribution: found only at Cerová-Lieskové (Miocene of Slovakia)