Parent taxon: Demospongiae according to K. A. Kolesnikov et al. 2024
See also Finks et al. 2004 and Garcia-Bellido et al. 2011
Sister taxa: Agelasida, Atrochaetetes, Bauneia, Blastochaetetes, Burgundiidae, Ceractinomorpha, Chaetetida, Chondrosida, Choristida, Clavaxinellida, Consinocodium, Desmacellidae, Dictyonellidae, Guadalupiida, Hadromerida, Halichondrida, Haplosclerida, 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
Subtaxa: Crumillospongia Falospongia Hazelia Keithospongos Lasiocladia Xylochos
Type: Hazelia
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Ordovician of the United Kingdom (5 collections)
• Cambrian of Canada (38: Brithish Columbia, British Columbia), China (15), Iran (1), Spain (2), United States (7: Pennsylvania, Utah)
Total: 68 collections including 102 occurrences