Classification of Schuchert 1914
G. †Protaster Forbes 1849
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†Protaster biforis Gregory 1897
†Protaster salteri Salter and Sowerby 1845
†Protaster sedgwickii Forbes 1849
Fm. †Hudsonasteridae Schuchert 1914
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Invalid names: Hudsonasterinae Schuchert 1914 [empty]
G. †Eugasterella Schuchert 1914
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†Eugasterella logani Hall 1868
Invalid names: Eugaster Hall 1868 [replaced]
Or. Cryptozonia Sladen 1889
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Fm. †Calliasterellidae Schöndorf 1910
G. †Echinodiscites Stürtz 1899
G. †Sturtzaster Etheridge 1899
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†Sturtzaster colvini Salter 1857
†Sturtzaster marstoni Salter 1857