Classification of Szalay 1969
†Pantolestes nuptus Cope 1882
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G. †Propalaeosinopa Simpson 1927
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Invalid names: Bessoecetor Simpson 1936 [synonym]
Fm. †Paromomyidae Simpson 1940
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Invalid names: Palaechthonini Szalay 1969 [empty]
Fm. †Mixodectidae Cope 1883
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G. †Mixodectes Cope 1883
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†Mixodectes malaris Cope 1884
Invalid names: Indrodon Cope 1884 [synonym], Olbodotes Osborn 1902 [synonym]
G. †Microsyops Leidy 1872
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†Microsyops alfi McKenna 1960
†Microsyops angustidens Matthew 1915
†Microsyops elegans Marsh 1871
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Invalid names: Bathrodon typus Marsh 1872 [synonym], Mesacodon speciosus Marsh 1872 [synonym], Microsyops gracilis Leidy 1872 [synonym], Palaeacodon verus Leidy 1872 [synonym]
†Microsyops latidens Cope 1882
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Invalid names: Cynodontomys knightensis Gazin 1952 [synonym], Notharctus cingulatus Loomis 1906 [synonym], Notharctus palmidens Loomis 1906 [synonym]
†Microsyops lundeliusi White 1952
†Microsyops scottianus Cope 1881
†Microsyops wilsoni Szalay 1969
Invalid names: Bathrodon Marsh 1872 [synonym], Cynodontomys Cope 1882 [synonym], Mesacodon Marsh 1872 [synonym], Palaeacodon Leidy 1872 [synonym]
†Elpidophorus elegans Simpson 1927
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Invalid names: Elpidophorus patratus Simpson 1936 [synonym]
†Leptacodon ladae Simpson 1935
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Invalid names: Mckennatherium libitum Van Valen 1965 [synonym]
†Mixodectes pungens Cope 1883
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Invalid names: Mixodectes crassiusculus Cope 1883 [synonym], Olbodotes copei Osborn 1902 [synonym]