Classification of Simpson 1925

Fm. †Spalacotheriidae Marsh 1887
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G. †Tinodon Marsh 1879
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†Tinodon bellus Marsh 1879
†Tinodon lepidus Marsh 1879
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Invalid names: Menacodon rarus Marsh 1887 [synonym]
Fm. †Amphidontidae Simpson 1925
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G. †Amphidon Simpson 1925
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†Amphidon aequicrurius Simpson 1925
†Amphidon superstes Simpson 1925