''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

Gallery

File:Clypeaster reticulatus both sides.jpg, ''Clypeaster reticulatus'' File:Clypeasterbowersi.jpg, Fossil of ''Clypeaster bowersi'' the San Diego Natural History Museum, California File:Clypeasterinsignis.jpg, Fossil of ''Clypeaster insignis'' at the San Diego County Fair, California File:Clypeaster portentosus.jpg, Fossil of ''Clypeaster portentosus'' at the Museo Arqueológico Municipal de Cartagena Image :Clypeaster rosaceus (Linnaeus, 1758) derivate 2013.jpg, ''Clypeaster rosaceus'' (aboral and internal views), by Ernst Haeckel in ''Kunstformen der Natur'' (1904). Image:Clypeaster japonicus - Osaka Museum of Natural History - DSC07832.JPG, ''Clypeaster japonicus''.

References

''Clypeaster'' Lamarck, 1801

National History Museum
*Sepkoski, Jac
Sepkoski's Online Genus Database

Paleobiology Database
Clypeaster, Clypeasteridae Echinoidea genera Extant Eocene first appearances Taxa named by Jean-Baptiste Lamarck {{Echinoidea-stub