Diadematidae

Diadematidae
Diadema setosum in Oman.
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Diadematoida
Family:	Diadematidae Gray, 1855 [1]

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
  • 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 ^[3]
• 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. ^[4]

Images

• 
  Astropyga radiata .
• 
  Centrostephanus longispinus .
• 
  Chaetodiadema granulatum
• 
  Diadema setosum .
• 
  Echinothrix calamaris .

References

1. "Diadematidae". Integrated Taxonomic Information System.
2. Maran, Vincent (2010-11-11). "Astropyga radiata (Leske, 1778)". DORIS (in French). Retrieved 2013-01-22.
3. "Black Sea Urchin". Museum Victoria. Retrieved 2011-05-13.
4. Knight, K. (2009). "Sea Urchins Use Whole Body As Eye". Journal of Experimental Biology. 213 (2): i–ii. doi: 10.1242/jeb.041715 .
   • Charles Q. Choi (December 28, 2009). "Body of Sea Urchin is One Big Eye". LiveScience (Press release).

Media related to Diadematidae at Wikimedia Commons