Classification of the family Agelacrinitidae

Fm. †Agelacrinitidae Clarke 1901
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G. †Agelacrinites Vanuxem 1842
Subfm. †Agelacrinitinae Chapman 1860
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G. †Sumrallia Mueller and Hahn 2017
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Sumrallia rseiberti Mueller and Hahn 2017
G. †Cooperidiscus Bassler 1935
Subfm. †Discocystinae Sumrall 1996
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G. †Lispidecodus Kesling 1967
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Lispidecodus plinthotus Kesling 1967
G. †Discocystis Gregory 1897
G. †Hystrichopsydrax Guensberg 1988
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Hystrichopsydrax sandersi Guensberg 1988
G. †Lepidodiscus Meek and Worthen 1868
G. †Neoisorophusella Kammer 1987
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Neoisorophusella whitesidei Sumrall et al. 2006
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Postibulla westergaardi Sumrall et al. 2006
Subfm. †Postibullinae Sumrall 2000
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G. †Parapostibulla Sumrall 2000
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Parapostibulla graysoni Sumrall et al. 2006
G. †Pyrgopostibulla Sumrall 2006
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Pyrgopostibulla belli Sumrall 2006
G. †Savagella
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Savagella illinoisensis Miller and Gurley 1895
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Invalid names: Savagella ornatus Savage 1913 [synonym]
G. †Thresherodiscus Foerste 1914
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Thresherodiscus ramosus Foerste 1914
G. †Ulrichidiscus Bassler 1935
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Ulrichidiscus forbesi Sumrall et al. 2006