Clypeaster

Clypeaster; Temporal range: Late Eocene - Recent PreꞒ Ꞓ O S D C P T J K Pg N
	Live Clypeaster reticulatus
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Clypeasteroida
Suborder:	Clypeasterina
Family:	Clypeasteridae
Genus:	Clypeaster; Lamarck, 1801

Clypeaster, common name "cake urchins" or "sea biscuits", is a genus of echinoderms belonging to the family Clypeasteridae.

Etymology

The genus name Clypeaster is derived from the Latin “clypeus” (meaning round shield) and “aster” (meaning star), with reference to the shape of these organisms.

List of species

Clypeaster aloysioi (Brito, 1959)
Clypeaster amplificatus Koehler, 1922
Clypeaster annandalei Koehler, 1922
Clypeaster australasiae (Gray, 1851)
Clypeaster chesheri Serafy, 1970
Clypeaster cyclopilus H.L. Clark, 1941
Clypeaster durandi (Cherbonnier, 1959b)
Clypeaster elongatus H.L. Clark, 1948
Clypeaster euclastus H.L. Clark, 1941
Clypeaster europacificus H.L. Clark, 1914
Clypeaster eurychorius H.L. Clark, 1924
Clypeaster euryptealus H.L. Clark, 1925
Clypeaster fervens Koehler, 1922
Clypeaster humilis (Leske, 1778)
Clypeaster isolatus Serafy, 1971
Clypeaster japonicus Döderlein, 1885
Clypeaster kieri Pawson & Phelan, 1979
Clypeaster lamprus H.L. Clark, 1914
Clypeaster latissimus (Lamarck, 1816)
Clypeaster leptostracon A. Agassiz & H.L. Clark, 1907
Clypeaster luetkeni Mortensen, 1948
Clypeaster lytopetalus A. Agassiz & H.L. Clark, 1907
Clypeaster microstomus Lambert, 1912 †
Clypeaster miniaceus H.L. Clark, 1925
Clypeaster minihagali Deraniyagala, 1956 †
Clypeaster nummus Mortensen, 1948
Clypeaster ochrus H.L. Clark, 1914
Clypeaster ohshimensis Ikeda, 1935
Clypeaster oliveirai Krau, 1952
Clypeaster pallidus H.L. Clark, 1914
Clypeaster pateriformis Mortensen, 1948
Clypeaster prostratus (Ravenel, 1845)
Clypeaster rangianus Desmoulins, 1835
Clypeaster rarispinus de Meijere, 1903
Clypeaster ravenelii (A. Agassiz, 1869)
Clypeaster reticulatus (Linnaeus, 1758)
Clypeaster rosaceus (Linnaeus, 1758)
Clypeaster rotundus (A. Agassiz, 1863)
Clypeaster speciosus Verrill, 1870
Clypeaster subdepressus (Gray, 1825)
Clypeaster telurus H.L. Clark, 1914
Clypeaster tumidus (Tension-Woods, 1878)
Clypeaster virescens Döderlein, 1885

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Gallery

Clypeaster reticulatus
Fossil of Clypeaster bowersi the San Diego Natural History Museum, California
Fossil of Clypeaster insignis at the San Diego County Fair, California
Fossil of Clypeaster portentosus at the Museo Arqueológico Municipal de Cartagena
Clypeaster rosaceus (aboral and internal views), by Ernst Haeckel in Kunstformen der Natur (1904).
Clypeaster japonicus.