Classification of Kornicker and Imbrie 1958

Fm. †Stichopitidae Frizzell and Exline 1955
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G. †Parvispina Kornicker and Imbrie 1958
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Parvispina harpago Kornicker and Imbrie 1958
Parvispina spinosa Frizzell and Exline 1955
G. Uncinulina Terquem 1862
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Uncinulina lunata Kornicker and Imbrie 1958
Fm. †Achistridae Frizzell and Exline 1955
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G. †Achistrum Etheridge 1881
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Achistrum brownwoodensis Croneis and McCormack 1932
Fm. Theeliidae Frizzell and Exline 1955
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G. †Microantyx Kornicker and Imbrie 1958
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Microantyx permiana Kornicker and Imbrie 1958