Classification of Sumrall and Gahn 2006

Or. †Isorophida
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Fm. †Agelacrinitidae Clarke 1901
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G. †Thresherodiscus Foerste 1914
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†Thresherodiscus ramosus Foerste 1914
Subfm. †Discocystinae Sumrall 1996
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G. †Lispidecodus Kesling 1967
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†Lispidecodus plinthotus Kesling 1967