Classification of Blake and Rozhnov 2007
Cl. Asteroidea de Blainville 1830 [sea star]
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Or. †Platyasterida Spencer 1951
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Fm. †Palasteriscidae Gregory 1900
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G. †Lanthanaster Branstrator 1972
G. †Palasteriscus Stürtz 1886
G. †Platanaster Spencer 1919
Subor. †Uractinina Spencer 1951
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Fm. †Urasterellidae Schuchert 1914
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G. †Salteraster Stürtz 1893
G. †Stiberaster Blake and Guensburg 1993
G. †Ulrichaster Spencer 1950
G. †Urasterella McCoy 1851
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†Urasterella ruthveni Forbes 1848
Invalid names: Phillipsaster Spencer 1950 [synonym], Roemeraster Stürtz 1886 [synonym]
Invalid names: Cnemidactinidae Spencer 1918 [synonym]