†family Gigantothalamiidae Senowbari-Daryan 1994 (demosponge)
Demospongiae - Verticillitida - Gigantothalamiidae
Parent taxon: Verticillitida according to B. Senowbari-Daryan and J. K. Rigby 2015
See also Finks et al. 2004
Sister taxa: Annaecoeliidae, Cheilosporitiidae, Colospongiidae, Cribrothalamiidae, Salzburgiidae, Tebagathalamiidae, Verticillitidae
Subtaxa: Gigantothalamia Lucaniaspongia Zanklithalamia
Ecology: stationary epifaunal suspension feeder
Distribution: