Alternative spellings: Demospongea, Demospongia, Demospongiea
Parent taxon: Porifera according to R. R. West et al. 2015
See also Briggs et al. 1994, Finks et al. 2004, Nielsen 2012, Pestana 1960, Senowbari-Daryan and Rigby 2015, Sepkoski 2002 and Worheide et al. 2012
Sister taxa: Adriatella, Aetholicopalla, Alasonia, Aphlebospongia, Archaeocyatha, Ascarum, Asteriscosella, Astrostylopsis, Axiotubullina, Bacatocyathus, Bicyathus, Bornium, Bortepesia, Calcarea, Cassianostroma, Ceraostroma, Circopora, Clathrispongia, Codites, Coenostella, Concretum, Coniatopenia, Cornuaspongia, Coronacollina, Cotyliscus, Cribricyatha, Cribroscyphia, Crisantum, Cuneiphycus, Cupulochonia, Cupulospongia, Cyclospongia, Cylicopsis, Cystiphyllum adrianense, Dendropora mirfia, Desmopora, Diestosphecion, Diplostomella, Disjectoporidae, Disparistromaria, Dulmius, Dulmius innovatus, Dyocopanon, Ellipsactinia, Encrinites apiosus, Encrinites disculus, Encrinites mirus, Encrinites nudus, Encrinites patiens, Encrinites perminutus, Encrinites praedominans, Encrinites praedominans alternatus, Encrinites quaesitus, Encrinites regularis, Encrinites tolomeus, Eocoryne, Eocyathispongia, Fedomia, Floriana, Glenodictyum, Helicolocellus, Heteractinida, Hexactinellida, Holocoelia, Homoscleromorpha, Idromecrinus, Lamellata, Lamellispongia, Limnoretheles, Lithopora, Megalelasma, Megastroma, Microcoryne, Milleporidium, Mirmus, Monotheles, Myrioporina, Nabaviella, Nelumbosium, Nelumbosium primum, Oligoplagia, Palaeophragmodictya, Paratubuliella, Parksia, Pharetronida, Pilosphecion, Plectinia, Polyactinellidae, Polycnemiseudea, Psephidia, Pulchrilaminida, Puppispongia, Puppispongia prostrema, Radicispongia, Rauffia, Reticullina, Rimpia, Rosellatana, Rugoconites, Scillus, Sclerospongiae, Scribroporella, Scyphia, Shitangspongia, Sinoflabrum, Siphonia permiana, Siphonia permiana elongatiuscula, Siphonia permiana ovoidalis, Siphonia permiana piriformis, Siphostroma, Sparsispongia, Sphaeractinia, Sphinctozoa, Spirocyathidae, Spongites lementarius, Spongites oculatus, Sporadoporidium, Steinerella, Stromatofungia, Stromatoporellata, Stromatoporellina, Stromatoporina, Stromatoporoidea, Stromatostroma, Taraxaculum, Textispongia, Thalamospongia, Thectardis, Toriscodermia, Tosastroma, Tragos, Trammeria, Tubispongia, Tubuliella, Virmula, Xizangstromatopora
Subtaxa: Agelasida Atrochaetetes Bauneia Blastochaetetes Burgundiidae Ceractinomorpha Chaetetida Chondrosida Choristida Clavaxinellida Consinocodium Desmacellidae Dictyonellidae Guadalupiida Hadromerida Halichondrida Haplosclerida Hazeliidae Hemiasterellidae Heteroscleromorpha Infexiostella Janussenia Karatubulus Keratosa Lithistida Lovcenipora Meandripetra Metschnikowia Monaxonida Myxospongiae Operculospongia Paraaplysinofibria Permosphincta Petrosina Poecilosclerida Polymastidae Ptychochaetetes Raspailiidae Riasanospongia Scopalinidae Spongillina Spongiopsammia Stelligeridae Tabulospongida Tetractinellida Tetractinomorpha Timeidae Trachycladidae Vauxiidae Verticillitida