Classification of Amsden 1951

G. †Brachyprion Shaler 1865
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†Brachyprion attenuata Amsden 1951
G. †Leptaena Dalman 1828
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†Leptaena oklahomensis Amsden 1951
G. †Leptaenisca Beecher 1890
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†Leptaenisca irregularis Amsden 1951
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†Lissostrophia cooperi Amsden 1949
G. †Strophonella Hall 1879
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†Strophonella laxiplicata Foerste 1903
†Strophonella loeblichi Amsden 1951
Superfm. †Dalmanellacea Schuchert and Cooper 1931
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G. †Dicaelosia King 1850