Alternative spellings: Spatangoidea, Spatangoidea
Full reference: L. Agassiz. 1840. Catalogus systematicus Ectyporum Echinodermatum fossilium Musei Neocomiensis, secundum ordinem zoologicum dispositus; adjectis synonymis recentioribus, nec non stratis et locis in quibus reperiuntur. Sequuntur characteres diagnostici generum novorum vel minus cognitorum. Petitpierre, Neuchâtel 1-20
Parent taxon: Atelostomata according to A. Kroh and A. B. Smith 2010
See also Berndt 2003, Clark 1904, Donovan 1993, Kew 1920, Manso and Andrade 2008, Parma and CasadÃo 2005, Sepkoski 2002, Smith 1991, Smith 1995, Squires 1984, Squires 1987 and Squires 1999
Sister taxa: Acrolusiidae, Asternata, Aulacopygus, Collyritidae, Disasteridae, Holasteroida, Notidisaster, Orbigniana, Pycnasterides, Sternata, Tithoniidae
Subtaxa: Allotoxaster Amoraster Apoxypetalum Archaeopneustes Asterostomatina Barnumia Brissidina Brissoides Cagaster Cestobrissus Cottreaucorys Echinocoridae Enichaster Gonzalezaster Hemiasteridae Hemiasterina Homoeopetalus Hypselaster Kertaster Leymeriaster Micrasterina Mundaster Murraypneustes Neoproraster Niponaster Nudobrissus Orthaster Palaeostomidae Paleopneustina Paraheteraster Peraspatangus Peroniaster Pictaviechinus Pliotoxaster Pseudogibbaster Pseudolinthia Pseudowashitaster Pusillaster Royasendia Somalechinus Somaliasteridae Spatagobrissus Tessieria Toxasteridae Toxasterina Wuarnia
Ecology: slow-moving shallow infaunal deposit feeder-detritivore