Diadematidae

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), extant
 * Astropyga pulvinata (Lamarck, 1816), extant
 * Astropyga magnifica (Clark, 1934), extant
 * Centrostephanus Peters, 1855
 * Centrostephanus asteriscus (Agassiz & Clark, 1907), extant
 * Centrostephanus coronatus (Verrill, 1867), extant
 * Centrostephanus fragile (Wiltshire in Wright, 1882), Santonian, Maastrichtian, Danian
 * Centrostephanus longispinus (Philippi, 1845), extant
 * Centrostephanus nitidus (Koehler, 1927), extant
 * Centrostephanus rodgersii (Agassiz, 1863), extant
 * Chaetodiadema Mortensen, 1903
 * Chaetodiadema granulatum (Mortensen, 1903), extant
 * Chaetodiadema keiense (Mortensen, 1903), extant
 * Chaetodiadema tuberculatum (Clark, 1909), extant
 * Diadema Gray, 1825
 * Diadema palmeri (Baker, 1967), extant
 * Diadema savignyi (Audouin, 1829), extant
 * Diadema setosum (Leske, 1778), extant
 * Diadema antillarum (Philippi, 1845), extant
 * Diadema paucispinum (Agassiz, 1863), extant
 * Diadema mexicanum (Agassiz, 1863), extant
 * Diadema ascensionis (Mortensen, 1909), extant
 * Echinodiadema Verrill, 1867
 * Echinodiadema coronata (Verrill, 1867), extant
 * Echinothrix Peters, 1853
 * Echinothrix calamaris (Pallas, 1774), extant
 * Echinothrix diadema (Linnaeus, 1758), extant
 * Eodiadema, Lower Jurassic
 * Eremopyga Agassiz & Clark, 1908
 * Eremopyga denudata (De Meijere, 1904), extant
 * Goniodiadema Mortensen, 1939
 * Goniodiadema mauritiense (Mortensen, 1939), extant
 * Kamptosoma Mortensen, 1903, extant
 * Palaeodiadema (Pomel, 1887), Santonian, Maastrichtian, Danian
 * Pedinothuria Louis, 1897
 * Pedinothuria cidaroides (Gregory, 1897), Callovian, Oxfordian

Senses
Like other sea urchins diadematids are sensitive to touch, light, and chemicals; additionally they do have eyes (eye spots) which is in contrast to other sea urchins. Because of this they can follow a threat with their spines.