Classification of Harper and Boucot 1978

G. †Amphistrophia Hall and Clarke 1892
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†Amphistrophia striata Hall 1843
G. †Amphistrophiella Harper and Boucot 1978
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Subg. †Amphistrophiella (Amphistrophiella) Harper and Boucot 1978
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G. †Amsdenostrophiella Harper and Boucot 1978
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G. †Aphanomena Bergstrom 1968
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†Aphanomena conradii Harrington 1950
G. †Brachyprion Shaler 1865
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†Gibberostrophia gibbera Amsden 1958
G. †Magniventra Harper and Boucot 1978
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G. †Strophonella Hall 1879
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Subg. †Strophonella (Quasistrophonella) Harper and Boucot 1978
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