Synonym: Corystidae Foster and Philip 1978 [replaced name]
Full reference: International Commission on Zoological Nomenclature. 2009. OPINION 2238 (Case 3419) CORYSTIDAE Foster & Philip, 1978 (Echinodermata, Echinoidea): spelling emended to CORYSTUSIDAE to remove homonymy with CORYSTIDAE Samouelle, 1819 (Crustacea, Brachyura). Bulletin of Zoological Nomenclature 66(4):371-372
Parent taxon: Echinoidea according to International Commission on Zoological Nomenclature 2009
See also Boyko 2008 and Foster and Philip 1978
Sister taxa: Acrosalenioida, Archaeocidaridae, Bromidechinus, Cassiduloidea, Centrechinoida, Cidaris aculeata, Cidaris aialensis, Cidaris alpina, Cidaris alternata, Cidaris austriaca, Cidaris avena, Cidaris biconica, Cidaris biformis, Cidaris braunii, Cidaris buchii, Cidaris caudex, Cidaris cingulata, Cidaris coralliophila, Cidaris costalarensis, Cidaris costata, Cidaris costeanensis, Cidaris decorata, Cidaris decoratissima, Cidaris dorsata, Cidaris ecki, Cidaris forminensis, Cidaris fustis, Cidaris glabra, Cidaris hausmanni, Cidaris lanceata, Cidaris linearis, Cidaris milierensis, Cidaris ovata, Cidaris perplexa, Cidaris petersii, Cidaris plana, Cidaris pyramidalis, Cidaris quadrialata, Cidaris quadriserrata, Cidaris regnyi, Cidaris remifera, Cidaris remifera, Cidaris reticulata, Cidaris schwageri, Cidaris scrobiculata, Cidaris seelandica, Cidaris semicostata, Cidaris similis, Cidaris spinachristi, Cidaris spongiosa, Cidaris stipes, Cidaris stoppanii, Cidaris sulcata, Cidaris tenuicostata, Cidaris tetraedrica, Cidaris trapezoidalis, Cidaris trigona, Cidaris triserrata, Cidaris undulatus, Cidaris valparolae, Cidaris verticillata, Cidaris verticillata, Cidaris waechteri, Cidaris wissmanni, Cidaris zardini, Cidaroidea, Dallonia, Diplocidaroida, Disasteroida, Echinoida, Echinopluteus, Euechinoidea, Exocycloida, Exocycloidea, Gajechinus, Gnathostomata, Hemicidaris gracilis, Hemicidaris obliquelineata, Oligopygoida, Ombria, Parechinus, Perischoechinoidea, Plegiocidaris senex, Pleurechinus, Proterocidaridae, Protocidaris, Radiolus, Radiolus adametzi, Radiolus alutensis, Radiolus antipai, Radiolus boletus, Radiolus complanatus, Radiolus culter, Radiolus festuca, Radiolus fusus, Radiolus herbichi, Radiolus lineola, Radiolus penna, Radiolus racadaui, Radiolus raiblianus, Radiolus rostratus, Radiolus segmentatus, Regularia, Strechoritina, Temnopleuroida, Uvanogelia, Vernius, Yunnanechinus
Subtaxa: Cardabia Corystus Huttonechinus
Ecology: epifaunal grazer-deposit feeder
Distribution:
• Oligocene of Australia (1 collection)
• Whaingaroan of New Zealand (1)
• Eocene of Australia (1)
• Paleocene of Australia (1)
• Cretaceous of Antarctica (1)
Total: 5 collections each including a single occurrence