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. †Cooperidiscus Bassler 1935
G. †Dinocystis Bather 1898
Subfm. †Discocystinae Sumrall 1996
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G. †Hypsiclavus
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†Hypsiclavus guensburgi Sumrall 1996
†Hypsiclavus huntsvillensis Sumrall 1996
†Hypsiclavus kinsleyi Sumrall 1996
†Hypsiclavus priesti Sumrall 1996
G. †Krama
G. †Neoisorophusella Kammer 1987
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†Neoisorophusella maslennikovi Sumrall 2009
†Neoisorophusella whitesidei Sumrall et al. 2006
Subfm. †Postibullinae Sumrall 2000
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G. †Savagella
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†Savagella illinoisensis Miller and Gurley 1895
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Invalid names: Savagella ornatus Savage 1913 [synonym]