''Aporocidaris'' is a genus of

sea urchin Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...

s in the family

Ctenocidaridae Ctenocidaridae is a family of echinoderms belonging to the order Cidaroida. Genera: * '' Aporocidaris'' Agassiz & Clark, 1907 * '' Ctenocidaris'' Mortensen, 1910 * '' Homalocidaris'' Mortensen, 1928 * ''Notocidaris ''Notocidaris'' is a genus of ...

. Several species are found in deep water in circum-Antarctic locations.

Characteristics

The

test Test(s), testing, or TEST may refer to: * Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities Arts and entertainment * ''Test'' (2013 film), an American film * ''Test'' (2014 film), ...

is rather compressed, with a flat base and thin fragile plates, and the apical system is conspicuously domed. The primary spines are long and very slender and the secondary spines are cylindrical and erect.

Species

The following species are recognised by the World Register of Marine Species: *'' Aporocidaris antarctica'' Mortensen, 1909 *'' Aporocidaris eltaniana'' Mooi, David, Fell & Choné, 2000 *'' Aporocidaris fragilis''

Agassiz Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he rec ...

Clark Clark is an English language surname, ultimately derived from the Latin with historical links to England, Scotland, and Ireland ''clericus'' meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educate ...

, 1907 *'' Aporocidaris incerta'' (Koehler, 1902) *'' Aporocidaris milleri'' (

, 1898) *'' Aporocidaris usarpi'' Mooi, David, Fell & Choné, 2000

References

Ctenocidaridae Cidaroida genera Taxa named by Hubert Lyman Clark {{echinoidea-stub