Classification of Tomida 1981
G. †Loxolophus Cope 1885
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†Loxolophus criswelli Rigby, Jr. 1980
†Loxolophus pentacus Cope 1888
Invalid names: Protogonodon Scott 1892 [synonym]
G. †Litomylus Simpson 1935
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†Litomylus perissus Gazin 1941
Invalid names: Oxytomodon Gazin 1941 [synonym]
G. †Triisodon Cope 1881
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†Triisodon antiquus Cope 1882
Invalid names: Sarcothraustes Cope 1882 [synonym]
†Periptychus carinidens Cope 1881
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Invalid names: Catathlaeus rhabdodon Cope 1881 [synonym]