Aporocidaris is a genus of sea urchins in the family Ctenocidaridae. Several species are found in deep water in circum-Antarctic locations.
Characteristics The test 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 & Clark, 1907 Aporocidaris incerta (Koehler, 1902) Aporocidaris milleri (Agassiz, 1898) Aporocidaris usarpi Mooi, David, Fell & Choné, 2000
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