Family of sea urchins
The Diadematidae are a family of sea urchins . Their tests are either rigid or flexible and their spines are long and hollow.[ 2]
Astropyga Gray , 1825
Centrostephanus Peters , 1855
Centrostephanus asteriscus Agassiz & Clark , 1907), extantCentrostephanus coronatus Verrill , 1867), extantCentrostephanus fragile Wiltshire in Wright , 1882), Santonian , Maastrichtian , Danian Centrostephanus longispinus Philippi , 1845), extantCentrostephanus nitidus Koehler , 1927), extantCentrostephanus rodgersii Agassiz , 1863), extant[ 3] Chaetodiadema Mortensen , 1903
Diadema 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
Echinothrix Peters , 1853
Eodiadema Lower Jurassic Eremopyga Agassiz & Clark , 1908
Goniodiadema Mortensen , 1939
Kamptosoma Mortensen , 1903, extantPalaeodiadema Pomel , 1887), Santonian , Maastrichtian , Danian Pedinothuria
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.[ 4]
Images
References
Diadematidae at Wikimedia Commons
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