†suborder Diadematoina Duncan 1889 (sea urchin)
Parent taxon: Diadematoida according to S. Nisiyama 1966
Sister taxa: Ancylocidaris, Diadematidae, Endeodiadema, Engelia, Helodiadema, Heteropedina, Macrodiadema
Subtaxa: none
Ecology: slow-moving low-level epifaunal grazer
Distribution: there are no occurrences of Diadematoina in the database