Classification of Lander 1998
G. †Merycoidodon Leidy 1848
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†Agriochoerus intermedius Van Houten
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G. †Blickohyus Schultz and Falkenbach 1968
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†Blickohyus auritus Leidy 1852
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Invalid names: Merycoidodon lambi Schultz and Falkenbach 1968 [synonym], Merycoidodon lynchi Schultz and Falkenbach 1968 [synonym], Mesoreodon danai Koerner 1940 [synonym], Oreodon hybridus Leidy 1869 [synonym], Paramerycoidodon (Gregoryochoerus) wanlessi Schultz and Falkenbach 1968 [synonym]
†Cotylops speciosa Leidy 1851
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G. †Cotylops Leidy 1851
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†Merychyus profectus Matthew and Cook 1909
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†Merycochoerus coenopus Scott 1890
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†Merycochoerus compressidens Douglass 1901
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†Merycochoerus elrodi Douglass 1901
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†Merycochoerus madisonius Douglass 1901
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†Merycoidodon culbertsonii Leidy 1848
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†Oreodon minor Cope 1888
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G. †Oreodon Leidy 1851
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Superfm. †Merycoidodontoidea
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Fm. †Merycoidodontidae Cook 1912 [oreodont]
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G. †Aclistomycter Wilson 1971
G. †Bathygenys Douglass 1902
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†Bathygenys hedlundae Schultz and Falkenbach 1968
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Invalid names: Parabathygenys paralpha Schultz and Falkenbach 1968 [synonym]
Invalid names: Megabathygenys Schultz and Falkenbach 1968 [synonym], Parabathygenys Schultz and Falkenbach 1968 [synonym]
G. †Brachycrus Matthew 1901
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†Brachycrus buwaldi Merriam 1919
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Invalid names: Brachycrus wilsoni Schultz and Falkenbach 1940 [synonym]
†Brachycrus rusticus Leidy 1870
†Brachycrus siouense Sinclair 1915
Invalid names: Pronomotherium Douglass 1907 [synonym]
G. †Eporeodon Marsh 1875
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†Eporeodon latidens Douglass 1907
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Invalid names: Desmatochoerus newchicagoensis Schultz and Falkenbach 1954 [synonym], Eporeodon cheeki Schlaikjer 1934 [synonym], Merycoides giganteus Schultz and Falkenbach 1949 [synonym], Mesoreodon megalodon Peterson 1907 [synonym], Mesoreodon scotti Schlaikjer 1934 [synonym], Promerycochoerus erythroceps Stock 1932 [synonym], Promerycochoerus gregoryi Loomis 1924 [synonym], Promerycochoerus grinnelli Koerner 1940 [synonym], Promerycochoerus hesperus Stock 1930 [synonym], Promerycochoerus thorpei Koerner 1940 [synonym], Pseudodesmatochoerus hoffmani Schultz and Falkenbach 1954 [synonym]
†Eporeodon minor Douglass 1903
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Invalid names: Desmatochoerus macrosynaphus Riel 1964 [synonym], Pseudodesmatochoerus wascoensis Schultz and Falkenbach 1954 [synonym]
†Eporeodon occidentalis Marsh 1873
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Invalid names: Eporeodon davisi Schultz and Falkenbach 1968 [synonym], Eporeodon leptacanthus Cope 1884 [synonym], Eporeodon longifrons Cope 1884 [synonym], Eporeodon perbullatus Thorpe 1921 [synonym], Eucrotaphus pacificus Cope 1884 [synonym], Otionohyus (Otarohyus) alexi Schultz and Falkenbach 1968 [synonym], Promesoreodon scanloni Schultz and Falkenbach 1949 [synonym], Subdesmatochoerus shannonensis Schultz and Falkenbach 1954 [synonym]
†Eporeodon pygmyus Loomis 1924
Invalid names: Desmatochoerus Thorpe 1921 [synonym], Hypselochoerus Loomis 1933 [synonym], Mesoreodon Scott 1893 [synonym], Promesoreodon Schultz and Falkenbach 1949 [synonym], Pseudodesmatochoerus Schultz and Falkenbach 1954 [synonym]
G. †Eucrotaphus Leidy 1850
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†Eucrotaphus galushai Schultz and Falkenbach 1968
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Invalid names: Genetochoerus (Osbornohyus) geygani Schultz and Falkenbach 1968 [synonym]
†Eucrotaphus jacksoni Leidy 1850
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Invalid names: Eporeodon cedrensis Matthew 1901 [synonym], Eporeodon socialis Marsh 1884 [synonym], Eucrotaphus dickinsonensis Douglass 1907 [synonym], Eucrotaphus helenae Douglass 1902 [synonym], Genetochoerus (Osbornohyus) norbeckensis Schultz and Falkenbach 1968 [synonym], Merycoidodon (Anomerycoidodon) dani Schultz and Falkenbach 1968 [synonym], Oreodon bullatus Leidy 1869 [synonym], Paramerycoidodon (Barbourochoerus) bacai Schultz and Falkenbach 1968 [synonym]
†Eucrotaphus trigonocephalus Cope 1884
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Invalid names: Dayohyus wortmani Schultz and Falkenbach 1968 [synonym], Eporeodon condoni Thorpe 1921 [synonym], Pseudogenetochoerus covensis Schultz and Falkenbach 1968 [synonym]
Invalid names: Dayohyus Schultz and Falkenbach 1968 [synonym], Pseudogenetochoerus Schultz and Falkenbach 1968 [synonym], Subdesmatochoerus Schultz and Falkenbach 1954 [synonym]
G. †Hypsiops Schultz and Falkenbach 1950
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†Hypsiops bannackensis Douglass 1907
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Invalid names: Pseudomesoreodon boulderensis Schultz and Falkenbach 1950 [synonym], Pseudomesoreodon rolli Schultz and Falkenbach 1950 [synonym]
†Hypsiops breviceps Douglass 1907
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Invalid names: Hypsiops johndayensis Schultz and Falkenbach 1950 [synonym], Pseudomesoreodon rooneyi Schultz and Falkenbach 1950 [synonym], Ticholeptus brachymelis Douglass 1907 [synonym], Ticholeptus petersoni Loomis 1923 [synonym]
Invalid names: Pseudomesoreodon Schultz and Falkenbach 1950 [synonym], Submerycochoerus Schultz and Falkenbach 1950 [synonym]
G. †Leptauchenia Leidy 1856
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†Leptauchenia eiselyi Schultz and Falkenbach 1968
†Leptauchenia major Leidy 1856
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†Leptauchenia major loganensis Koerner 1940
†Leptauchenia major schucherti Thorpe 1921
Invalid names: Brachymeryx feliceps Cope 1877 [synonym], Cyclopidius emydinus Cope 1884 [synonym], Cyclopidius incisivus Scott 1893 [synonym], Cyclopidius lullianus Thorpe 1921 [synonym], Cyclopidius simus Cope 1877 [synonym], Hadroleptauchenia extrema Schultz and Falkenbach 1968 [synonym], Hadroleptauchenia shanafeltae Schultz and Falkenbach 1968 [synonym], Leptauchenia densa Loomis 1925 [synonym], Leptauchenia margeryae Schultz and Falkenbach 1968 [synonym], Leptauchenia martini Schultz and Falkenbach 1968 [synonym], Leptauchenia parasimus Schultz and Falkenbach 1968 [synonym], Pithecistes altageringensis Schultz and Falkenbach 1968 [synonym], Pithecistes copei Schultz and Falkenbach 1968 [synonym]
†Leptauchenia orellaensis Schultz and Falkenbach 1968
†Leptauchenia platyceps Douglass 1902
Invalid names: Brachymeryx Cope 1877 [synonym], Cyclopidius Cope 1877 [synonym], Hadroleptauchenia Schultz and Falkenbach 1968 [synonym], Limnenetes Douglass 1902 [synonym], Pithecistes Cope 1877 [synonym], Pseudocyclopidius Schultz and Falkenbach 1968 [synonym], Pseudoleptauchenia Unknown [objective synonym]
G. †Merychyus Leidy 1858
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†Merychyus arenarum Cope 1884
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Invalid names: Merychyus delicatus Loomis 1924 [synonym], Merychyus euryops Cope 1899 [synonym]
†Merychyus major Leidy 1858
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Invalid names: Merycochoerus (Pronomotherium) californicus Merriam 1919 [synonym]
†Merychyus medius Leidy 1858
†Merychyus minimus Peterson 1907
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Invalid names: Merychyus calaminthus Jahns 1940 [synonym], Merychyus jahnsi Whistler 1967 [synonym], Merychyus paniensis Loomis 1924 [synonym], Merychyus verrucomalus Stevens 1970 [synonym]
†Merychyus novomexicanus Frick 1929
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Invalid names: Ustatochoerus skinneri Schultz and Falkenbach 1941 [synonym]
†Merychyus smithi Douglass 1903
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Invalid names: Merychyus calimontanus Dougherty 1940 [synonym], Ticholeptus tooheyi Schultz and Falkenbach 1941 [synonym]
Invalid names: Metoreodon Matthew and Cook 1909 [synonym], Ustatochoerus Schultz and Falkenbach 1941 [synonym]
G. †Merycochoerus Leidy 1858
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†Merycochoerus carrikeri Peterson 1907
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Invalid names: Promerycochoerus thomsoni Loomis 1924 [synonym]
†Merycochoerus chelydra Cope 1884
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Invalid names: Promerycochoerus (Parapromerycochoerus) barbouri Schultz and Falkenbach 1949 [synonym]
†Merycochoerus pinensis Schultz and Falkenbach 1949
†Merycochoerus superbus Leidy 1870
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Invalid names: Megoreodon fricki Schultz and Falkenbach 1954 [synonym], Merycochoerus leidyi Bettany 1876 [synonym], Merycochoerus macrostegus Cope 1884 [synonym], Merycochoerus montanus Cope 1884 [synonym], Merycochoerus temporalis Bettany 1876 [synonym], Promerycochoerus grandis Douglass 1907 [synonym], Promerycochoerus hatcheri Douglass 1907 [synonym], Promerycochoerus hollandi Douglass 1907 [synonym], Promerycochoerus inflatus Thorpe 1921 [synonym], Promerycochoerus latidens Thorpe 1921 [synonym], Promerycochoerus loomisi Schlaikjer 1934 [synonym], Promerycochoerus lulli Thorpe 1921 [synonym], Promerycochoerus marshi Thorpe 1921 [synonym], Promerycochoerus microcephalus Thorpe 1921 [synonym]
†Merycochoerus vantasselensis Peterson 1907
Invalid names: Megoreodon Schultz and Falkenbach 1954 [synonym], Paracotylops Matthew 1901 [synonym], Promerycochoerus Douglass 1901 [synonym], Superdesmatochoerus Schultz and Falkenbach 1954 [synonym]
G. †Merycoides Douglass 1907
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†Merycoides harrisonensis Peterson 1907
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Invalid names: Hypsiops leptoscelos Stevens et al. 1969 [synonym], Hypsiops luskensis Schultz and Falkenbach 1950 [synonym], Merychyus siouxensis Loomis 1924 [synonym], Phenacocoelus kayi Schultz and Falkenbach 1950 [synonym]
†Merycoides longiceps Douglass 1907
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Invalid names: Phenacocoelus stouti Schultz and Falkenbach 1950 [synonym]
†Merycoides relictus Loomis 1924
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Invalid names: Desmatochoerus (Paradesmatochoerus) sanfordi Schultz and Falkenbach 1954 [synonym], Eporeodon thurstoni Stock 1934 [synonym], Merycoides nebraskensis Schultz and Falkenbach 1949 [synonym]
Invalid names: Paramerychyus Schultz and Falkenbach 1947 [synonym]
G. †Oreodontoides Thorpe 1921
G. †Oreonetes Loomis 1924
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†Oreonetes anceps Douglass 1902
†Oreonetes chadronensis Schultz and Falkenbach 1956
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Invalid names: Stenopsochoerus reideri Schultz and Falkenbach 1956 [synonym]
†Oreonetes cheyennensis Schultz and Falkenbach 1956
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Invalid names: Miniochoerus (Paraminiochoerus) ottensi Schultz and Falkenbach 1956 [synonym], Platyochoerus hatcreekensis Schultz and Falkenbach 1956 [synonym]
†Oreonetes gracilis Leidy 1851
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Invalid names: Merycoidodon platycephalus Thorpe 1921 [synonym], Miniochoerus battlecreekensis Schultz and Falkenbach 1956 [synonym], Oreodon affinis Leidy 1869 [synonym], Oreodon coloradoensis Matthew 1909 [synonym], Parastenopsochoerus conversensis Schultz and Falkenbach 1956 [synonym], Stenopsochoerus (Pseudostenopsochoerus) douglasensis Schultz and Falkenbach 1956 [synonym], Stenopsochoerus sternbergi Schultz and Falkenbach 1956 [synonym]
†Oreonetes nicholsae Schultz and Falkenbach 1956
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Invalid names: Stenopsochoerus berardae Schultz and Falkenbach 1956 [synonym]
†Oreonetes starkensis Schultz and Falkenbach 1956
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Invalid names: Miniochoerus helprini Schultz and Falkenbach 1956 [synonym], Platyochoerus heartensis Schultz and Falkenbach 1956 [synonym], Stenopsochoerus joderensis Schultz and Falkenbach 1956 [synonym]
Invalid names: Miniochoerus Schultz and Falkenbach 1956 [synonym], Parastenopsochoerus Schultz and Falkenbach 1956 [synonym], Platyochoerus Schultz and Falkenbach 1956 [synonym], Stenopsochoerus Schultz and Falkenbach 1956 [synonym]
G. †Paroreodon Thorpe 1921
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†Paroreodon parvus Thorpe 1921
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Invalid names: Oreodontoides stocki Schultz and Falkenbach 1947 [synonym], Paroreodon marshi Thorpe 1921 [synonym]
Invalid names: Epigenetochoerus Schultz and Falkenbach 1968 [synonym]
G. †Phenacocoelus Peterson 1907
G. †Prodesmatochoerus Schultz and Falkenbach 1954
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†Prodesmatochoerus dunagani Wilson 1971
†Prodesmatochoerus lewisi Clark and Beerbower 1967
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Invalid names: Otionohyus vanderpooli Schultz and Falkenbach 1968 [synonym]
†Prodesmatochoerus macrorhinus Douglass 1903
†Prodesmatochoerus periculorum Cope 1884
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Invalid names: Oreodon robustum Douglass 1902 [synonym], Otionohyus wardi Schultz and Falkenbach 1968 [synonym], Paramerycoidodon georgei Schultz and Falkenbach 1968 [synonym], Prodesmatochoerus meekae Schultz and Falkenbach 1954 [synonym]
Invalid names: Genetochoerus Schultz and Falkenbach 1968 [synonym], Otionohyus Schultz and Falkenbach 1968 [synonym], Paramerycoidodon Schultz and Falkenbach 1968 [synonym]
G. †Sespia Stock 1930
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†Sespia nitida Leidy 1869
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Invalid names: Cyclopidius heterodon Cope 1877 [synonym], Leptauchenia californica Stock 1930 [synonym], Leptauchenia minora Schlaikjer 1935 [synonym], Megasespia middleswarti Schultz and Falkenbach 1968 [synonym], Sespia marianae Schultz and Falkenbach 1968 [synonym], Sespia ultima Schultz and Falkenbach 1968 [synonym]
Invalid names: Megasespia Schultz and Falkenbach 1968 [synonym]
G. †Ticholeptus Cope 1878
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†Ticholeptus zygomaticus Cope 1878
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Invalid names: Merycochoerus obliquidens Cope 1886 [synonym], Poatrephes paludicola Douglass 1903 [synonym], Ticholeptus hypsodus Loomis 1924 [synonym], Ticholeptus rileyi Schultz and Falkenbach 1941 [synonym], Ustatochoerus schrammi Schultz and Falkenbach 1941 [synonym]
Invalid names: Poatrephes Douglass 1903 [synonym]
G. †Agriochoerus Leidy 1850
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†Agriochoerus crassus Scott 1945
†Agriochoerus gaudryi Osborn and Wortman 1893
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Invalid names: Agriomeryx migrans Marsh 1894 [synonym]
†Agriochoerus guyotianus Cope 1878
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Invalid names: Agriochoerus bullatus Thorpe 1921 [synonym], Agriochoerus trifrons Cope 1884 [synonym], Coloreodon ferox Cope 1879 [synonym], Coloreodon macrocephalus Cope 1879 [synonym], Coloreodon ryderanus Cope 1881 [synonym]
†Agriochoerus matthewi Peterson 1919
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Invalid names: Diplobunops leotensis Scott 1945 [synonym], Diplobunops uintensis Peterson 1931 [synonym], Diplobunops ultimus Peterson 1931 [synonym]
†Agriochoerus pearcei Gazin 1956
Invalid names: Agriomeryx Marsh 1894 [synonym], Artionyx Osborn and Wortman 1893 [synonym], Coloreodon Cope 1879 [synonym], Diplobunops Peterson 1919 [synonym], Eomeryx Marsh 1894 [synonym], Merycopater Cope 1879 [synonym]
G. †Protoreodon Scott and Osborn 1887
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†Protoreodon annectens Scott 1899
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Invalid names: Mesagriochoerus primus Peterson 1934 [synonym], Protoreodon medius Peterson 1919 [synonym]
†Protoreodon tardus Scott 1945
Invalid names: Chorotherium Berg 1899 [synonym], Hyomeryx Marsh 1894 [synonym], Mesagriochoerus Peterson 1934 [synonym], Protagriochoerus Scott 1899 [synonym]
†Agriochoerus antiquus Leidy 1850
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Invalid names: Agriochoerus latifrons Leidy 1869 [synonym], Mesonyx dakotensis Scott 1892 [synonym]
†Bathygenys alpha Douglass 1902
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Invalid names: Megabathygenys goorisi Schultz and Falkenbach 1968 [synonym]
†Eporeodon major Leidy 1853
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Invalid names: Desmatochoerus (Paradesmatochoerus) grangeri Schultz and Falkenbach 1954 [synonym], Desmatochoerus (Paradesmatochoerus) wyomingensis Schultz and Falkenbach 1954 [synonym], Eporeodon meagherensis Schultz and Falkenbach 1968 [synonym], Eucrotaphus montanus Douglass 1907 [synonym], Mesoreodon chelonyx Scott 1893 [synonym], Mesoreodon intermedius Scott 1893 [synonym], Mesoreodon wheeleri Koerner 1940 [synonym], Promerycochoerus (Desmatochoerus) curvidens Thorpe 1921 [synonym], Pseudodesmatochoerus milleri Schultz and Falkenbach 1954 [synonym]
†Leptauchenia decora Leidy 1856
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Invalid names: Hadroleptauchenia primitiva Schultz and Falkenbach 1968 [synonym], Leptauchenia harveyi Schultz and Falkenbach 1968 [synonym], Pithecistes tanneri Schultz and Falkenbach 1968 [synonym], Pseudocyclopidius frankforteri Schultz and Falkenbach 1968 [synonym]
†Leptauchenia loganensis Lander 1998
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Invalid names: Cyclopidius quadratus Koerner 1940 [synonym]
†Leptauchenia schucherti Lander 1998
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Invalid names: Pithecistes mariae Schultz and Falkenbach 1968 [synonym]
†Oreodontoides oregonensis Thorpe 1921
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Invalid names: Desmatochoerus anthyonyi Schultz and Falkenbach 1968 [synonym], Merychyus curtus Loomis 1924 [synonym]
†Phenacocoelus typus Peterson 1907
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Invalid names: Phenacocoelus munroensis Peterson 1928 [synonym]
†Prodesmatochoerus natronensis Schultz and Falkenbach 1954
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Invalid names: Merycoidodon forsythae Schultz and Falkenbach 1968 [synonym]
†Protoreodon parvus Scott and Osborn 1887
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Invalid names: Agriotherium paradoxicus Scott 1898 [synonym], Hyomeryx breviceps Marsh 1894 [synonym], Protoreodon minor Scott 1899 [synonym]