Classification of Gutschick 1959
Cl. Holothuroidea de Blainville 1834 [sea cucumber]
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Fm. †Calclamnidae Frizzell and Exline 1955
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G. †Achistrum Etheridge 1881
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†Achistrum brevis Gutschick 1959
†Achistrum ludwigi Croneis and McCormack 1932
†Achistrum nicholsoni Etheridge 1881
†Aschistrum triassicum Frizzell and Exline 1955
G. †Thuroholia Gutschick 1954
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†Thuroholia marginata Langenheim and Epis 1957
†Thuroholia mccormacki Frizzell and Exline 1955
†Thuroholia spicatus Gutschick 1959
Fm. Theeliidae Frizzell and Exline 1955
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