Classification of Villier et al. 2007

Cl. Asteroidea de Blainville 1830 [sea star]
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Subcl. Neoasteroidea Gale 1987
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Superor. Valvatacea McKnight 1975
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Or. Paxillosida Perrier 1884
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Fm. Astropectinidae Gray 1840
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G. †Prothrissacanthias Villier et al. 2007
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Prothrissacanthias africanus Villier et al. 2007
G. †Coulonia de Loriol 1874
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Coulonia platispina Hess and Blake 1995