The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow.
Astropyga (Gray, 1825)Astropyga radiata (Leske, 1778), extantAstropyga pulvinata (Lamarck, 1816), extantAstropyga magnifica (Clark, 1934), extantCentrostephanus (Peters, 1855)Centrostephanus asteriscus (Agassiz & Clark, 1907), extantCentrostephanus coronatus (Verrill, 1867), extantCentrostephanus fragile (Wiltshire in Wright, 1882), Santonian, Maastrichtian, DanianCentrostephanus longispinus (Philippi, 1845), extantCentrostephanus nitidus (Koehler, 1927), extantCentrostephanus rodgersii (Agassiz, 1863), extantChaetodiadema (Mortensen, 1903)Chaetodiadema granulatum (Mortensen, 1903), extantChaetodiadema keiense (Mortensen, 1903), extantChaetodiadema tuberculatum (Clark, 1909), extantDiadema (Humpfreys, 1797)Diadema palmeri (Baker, 1967), extantDiadema savignyi (Audouin, 1829), extantDiadema setosum (Leske, 1778), extantDiadema antillarum (Philippi, 1845), extantDiadema paucispinum (Agassiz, 1863), extantDiadema mexicanum (Agassiz, 1863), extantDiadema ascensionis (Mortensen, 1909), extantEchinodiadema (Verrill, 1867)Echinodiadema coronata (Verrill, 1867), extantEchinothrix (Peters, 1853)Echinothrix calamaris (Pallas, 1774), extantEchinothrix diadema (Linnaeus, 1758), extantEodiadema, Lower JurassicEremopyga (Agassiz & Clark, 1908)Eremopyga denudata (De Meijere, 1904), extantGoniodiadema (Mortensen, 1939)Goniodiadema mauritiense (Mortensen, 1939), extantKamptosoma (Mortensen, 1903), extantPalaeodiadema (Pomel, 1887), Santonian, Maastrichtian, DanianPedinothuria (Louis, 1897)Pedinothuria cidaroides (Gregory, 1897), Callovian, OxfordianTrichodiadema (Agassiz, 1863)Trichodiadema rodgersii (Agassiz, 1863), extant
