Invalid names: Cottaldia australis White 1887 [synonym], Diadema granulare Agassiz 1846 [synonym], Diadema kleinii Desmoulins 1837 [synonym], Diadema polystigma Agassiz 1840 [synonym], Hemipedina charltoni Cragin 1894 [synonym], Orthopsis morgani Cotteau and Gauthier 1895 [synonym], Orthopsis planulata Clark and Twitchell 1915 [synonym], Orthopsis sanfilippoi Checchia-Rispoli 1933 [synonym], Pseudodiadema grangeri Maury 1936 [synonym]