Classification of Archibald 1982
†Boreodon matutinus Lambe 1902
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G. †Boreodon Lambe 1902
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Or. †Multituberculata Cope 1884 [multituberculate]
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G. †Paracimexomys Archibald 1982
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†Paracimexomys judithae Sahni 1972
†Paracimexomys magister Fox 1971
†Paracimexomys magnus Sahni 1972
†Paracimexomys priscus Lillegraven 1969
G. †Mesodma Jepsen 1940
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†Mesodma formosa Marsh 1889
†Mesodma garfieldensis Archibald 1982
G. †Meniscoessus Cope 1882
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†Meniscoessus robustus Marsh 1889
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Invalid names: Dipriodon lunatus Marsh 1889 [synonym], Halodon sculptus Marsh 1889 [synonym], Meniscoessus borealis Simpson 1927 [synonym], Oracodon anceps Marsh 1889 [synonym], Oracodon conulus Marsh 1892 [synonym], Selenacodon fragilis Marsh 1889 [synonym], Tripriodon coelatus Marsh 1889 [synonym]
Fm. †Eucosmodontidae Jepsen 1940
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G. †Peradectes Matthew and Granger 1921
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†Peradectes pusillus Matthew and Granger 1921
Invalid names: Thylacodon Matthew and Granger 1921 [synonym]
G. †Eodelphis Matthew 1916
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†Eodelphis browni Matthew 1916
†Eodelphis cutleri Woodward 1916
G. †Protungulatum Sloan and Van Valen 1965
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†Protungulatum mckeeveri Archibald 1982
G. †Gypsonictops Simpson 1927
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Invalid names: Euangelistes Simpson 1929 [synonym]
Fm. †Periptychidae Cope 1882 [condylarth]
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G. †Oxyacodon Osborn and Earle 1895
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†Oxyacodon agapetillus Cope 1884
†Oxyacodon priscilla Matthew 1937
†Cimolestes incisus Marsh 1889
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Invalid names: Nyssodon punctidens Simpson 1927 [synonym]
†Cimolomys gracilis Marsh 1889
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Invalid names: Selenacodon brevis Marsh 1889 [synonym]
G. †Ragnarok Van Valen 1978
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†Ragnarok engdahli Archibald 1982
†Ragnarok nordicum Jepsen 1930