Parent taxon: Porifera according to C. W. Stearn et al. 1999
Sister taxa: Archaeocyatha, Calcarea, Caliculospongia, Clathrispongia, Coronacollina, Cotyliscus, Cuneiphycus, Cyathophyscus, Cyclospongia, Demospongea, Disjectoporidae, Drosdovia, Eocoryne, Glenodictyum, Heteractinida, Hexactinellida, Holocoelia, Matthewcyathus, Megalelasma, Microcoryne, Mussooriella, Nabaviella, Nostrocyathus, Oligoplagia, Phymoraphinia, Polyactinellidae, Scyphia, Shitangspongia, Sinoflabrum, Solactiniella, Tragos, Trammeria
Subtaxa: Actinostromatida, Aculatostroma, Amnestostroma, Amphiporida, Andenipora, Auroria, Clathrodictyida, Clavidictyon, Columna, Diparistomaria, Diplostroma, Drosdoria, Edelsteinia, Faciledictyon, Flexiostroma, Forolina, Hexastylostroma, Imponodictyon, Khasaktia, Labechiida, Lamellopora, Lecomptella, Maldeotaina, Mixtusdictyon, Nuratadictyon, Paramphipora, Perplexostroma, Petroidistroma, Plumatalina, Praeidiostroma, Pseudoactinostroma, Pseudostromatoporella, Rackovskia, Sergaelites, Shirdagopora, Stromatodictyon, Stromatoporellida, Stromatoporida, Synthetostroma, Syringostromatida, Trigonostroma, Vittia, Zeravshanella
Ecology: stationary epifaunal suspension feeder-photosymbiotic