Classification of Harper and Morris 1978

Subcl. Ophiuroidea Gray 1840 [brittle star]
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Or. Oegophiurida Matsumoto 1915
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Subor. †Lysophiurina Gregory 1897
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Fm. †Encrinasteridae Schuchert 1914
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Subfm. †Armathyrasterinae Harper and Morris 1978
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G. †Armathyraster Harper and Morris 1978
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Armathyraster paradoxis Harper and Morris 1978
Subfm. †Encrinasterinae Harper and Morris 1978
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G. †Cheiropteraster Stürtz 1890
G. †Crepidosoma Spencer 1930
G. †Encrinaster Haekel 1866
G. †Euzonosoma Spencer 1930
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Invalid names: Schoenaster Meek and Worthen 1860 [synonym]
G. †Loriolaster Stürtz 1886
G. †Urosoma Spencer 1930