Classification of Wernlund 1977
Cl. Holothuroidea de Blainville 1834 [sea cucumber]
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Fm. †Achistridae Frizzell and Exline 1955
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G. †Achistrum Etheridge 1881
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†Achistrum monochordata Hodson et al. 1956
†Achistrum nicholsoni Etheridge 1881
Fm. †Calclamnidae Frizzell and Exline 1955
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G. †Eocaudina Martin 1952
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†Eocaudina marginata Langenheim and Epis 1957
†Eocaudina mccormacki Frizzell and Exline 1955
†Eocaudina septaforaminalis Martin 1952
†Eocaudina subhexagona Gutschick et al. 1967
G. †Thuroholia Gutschick 1954
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†Thuroholia cribriformis Gutschick 1954
†Thuroholia croneisi Gutschick 1954
Fm. †Paleochiridotidae Frizzell and Exline 1966
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G. †Rota Langenheim and Epis 1957
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†Rota campbelli Gutschick 1959
†Rota martini Langenheim and Epis 1957
Fm. †Priscopedatidae Frizzell and Exline 1955
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G. Priscopedatus Schlumberger 1890
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†Priscopedatus bullatus Wernlund 1977
†Priscopedatus buno Wernlund 1977
†Priscopedatus pyramidalis Schlumberger 1890
†Priscopedatus radiatus Wernlund 1977
†Priscopedatus spicaudina Gutschick et al. 1967
†Priscopedatus stellatus Wernlund 1977
Fm. †Stichopitidae Frizzell and Exline 1955
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Fm. Theelidae Frizzell and Exline 1955
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Invalid names: Calclyridae Frizzell and Exline 1955 [empty], Protocaudinidae Deflandre-Rigaud 1962 [empty]