Classification of the subfamily Merychyinae

Subfm. †Merychyinae Simpson 1945
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G. †Merychyus Leidy 1858
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Subg. †Merychyus (Metoreodon) Matthew and Cook 1909
†Merychyus arenarum Cope 1884
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Invalid names: Merychyus arenarum idahoensis Schultz and Falkenbach 1947 [invalid subgroup], Merychyus arenarum leptorhynchus Cope 1884 [invalid subgroup], Merychyus euryops Cope 1899 [synonym]
†Merychyus calaminthus Jahns 1940
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Invalid names: Merychyus crabilli Schultz and Falkenbach 1947 [synonym], Merychyus crabilli ziaensis Schultz and Falkenbach 1968 [synonym], Merychyus jahnsi Whistler 1967 [synonym]
†Merychyus elegans Leidy 1858
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Invalid names: Merychyus paniensis Loomis 1924 [synonym]
†Merychyus minimus Peterson 1907
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Invalid names: Merychyus delicatus Loomis 1924 [synonym]
†Merychyus relictus Matthew and Cook 1909
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Invalid names: Merychyus (Metoreodon) relictus taylori Schultz and Falkenbach 1947 [invalid subgroup]
†Merychyus verrucomalus Stevens 1970
Invalid names: Merychyus (Metoreodon) relictus fletcheri Schultz and Falkenbach 1947 [invalid subgroup], Metoreodon Matthew and Cook 1909 [synonym]
G. †Oreodontoides Thorpe 1921
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†Oreodontoides curtus Loomis 1924
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Invalid names: Desmatochoerus anthyonyi Schultz and Falkenbach 1968 [synonym]
G. †Paramerychyus Schultz and Falkenbach 1947
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†Paramerychyus harrisonensis Peterson 1907
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Invalid names: Merychyus siouxensis Loomis 1924 [synonym]
†Paramerychyus relictus Loomis 1924