Classification of Williamson and Lucas 1993

†Ellipsodon aequidens Matthew 1937
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Fm. Didelphidae Gray 1821 [opossum]
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G. †Thylacodon Matthew and Granger 1921
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†Thylacodon pusillus Matthew and Granger 1921
G. †Cimolestes Marsh 1889
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†Cimolestes simpsoni Reynolds 1936
Invalid names: Puercolestes Reynolds 1936 [synonym]
G. †Coriphagus Douglass 1908
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†Coriphagus encinensis Matthew and Granger 1921
Invalid names: Mixoclaenus Matthew and Granger 1921 [synonym]
G. †Pentacodon Scott 1892
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†Pentacodon inversus Cope 1888
G. †Adunator Russell 1964
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Invalid names: Mckennatherium Van Valen 1965 [synonym]
G. †Palaechthon Gidley 1923
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†Palaechthon torrejonius Kay and Cartmill 1977
Invalid names: Talpohenach Kay and Cartmill 1977 [synonym]
G. †Plesiolestes Jepsen 1930
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†Plesiolestes wilsoni Gazin 1968
Invalid names: Torrejonia Gazin 1968 [synonym]
G. †Prolimnocyon Matthew and Granger 1915
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†Prolimnocyon durini Van Valen 1978
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Invalid names: Prolimnocyon macfaddeni Rigby, Jr. 1980 [synonym]
G. †Protictis Matthew
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†Protictis vanvaleni MacIntyre 1966
Invalid names: Bryanictis MacIntyre 1966 [synonym], Simpsonictis MacIntyre 1962 [synonym]
G. †Arctocyon Blainville 1841
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†Arctocyon latidens Gidley 1919
†Arctocyon montanensis Gidley 1919
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Invalid names: Claenodon vecordensis Simpson 1935 [synonym], Neoclaenodon silberlingi Gidley 1919 [synonym]
†Arctocyon mumak Van Valen 1978
Invalid names: Claenodon Scott 1892 [synonym], Neoclaenodon Gidley 1919 [synonym]
G. †Chriacus Cope 1883
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Invalid names: Metachriacus Simpson 1935 [synonym], Spanoxyodon Simpson 1935 [synonym], Tricentes Cope 1884 [synonym]
G. †Colpoclaenus Patterson and McGrew 1962
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†Colpoclaenus procyonoides Matthew 1937
G. †Desmatoclaenus Gazin 1941
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G. †Loxolophus Cope 1885
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†Loxolophus priscus Cope 1888
†Loxolophus stenognathus Matthew 1897
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Invalid names: Protogonodon grangeri Simpson 1936 [synonym]
G. †Prothryptacodon Simpson 1935
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†Prothryptacodon ambiguus Van Valen 1967
†Prothryptacodon hilli Rigby, Jr. 1980
Invalid names: Pantinomia Van Valen 1967 [synonym]
Fm. †Mioclaenidae Osborn and Earle 1895 [condylarth]
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G. †Bomburia Van Valen 1978
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†Bomburia priscus Matthew 1937
G. †Tiznatzinia Simpson 1936
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†Tiznatzinia vanderhoofi Simpson 1936
G. †Bubogonia Johnston and Fox 1984
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†Bubogonia bombadili Van Valen 1978
G. †Choeroclaenus Simpson 1937
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G. †Protoselene Matthew 1897
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†Protoselene griphus Gazin 1939
Invalid names: Dracoclaenus Gazin 1939 [synonym]
Fm. †Periptychidae Cope 1882 [condylarth]
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G. †Escatepos Reynolds 1936
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†Escatepos campi Reynolds 1936
G. †Conacodon Matthew 1897
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†Conacodon cophater Cope 1884
†Conacodon entoconus Cope 1882
G. †Haploconus Cope 1882
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†Haploconus angustus Cope 1881
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Invalid names: Haploconus corniculatus Cope 1888 [synonym]
G. †Oxyacodon Osborn and Earle 1895
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†Oxyacodon priscilla Matthew 1937
Invalid names: Fimbrethil Van Valen 1978 [synonym]
G. †Periptychus Cope 1881
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Invalid names: Periptychus matthewi Simpson 1936 [synonym]
Invalid names: Carsioptychus Simpson 1936 [synonym], Catathlaeus Cope 1881 [synonym], Plagioptychus Matthew 1936 [synonym]
Or. †Mesonychia [mesonychian]
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G. †Triisodon Cope 1881
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Invalid names: Triisodon rusticus Cope 1884 [synonym]
G. †Eoconodon Matthew and Granger 1921
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†Eoconodon coryphaeus Cope 1885
†Eoconodon gaudrianus Cope 1888
G. †Goniacodon Scott 1892
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†Goniacodon levisanus Cope 1883
G. †Microclaenodon Scott 1892
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†Acmeodon secans Matthew and Granger 1921
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Invalid names: Acmeodon hyoni Rigby, Jr. 1980 [synonym]
†Catopsalis fissidens Cope 1884
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Invalid names: Catopsalis utahensis Gazin 1939 [synonym]
†Catopsalis foliatus Cope 1882
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Invalid names: Catopsalis johnstoni Fox 1989 [synonym]
†Chriacus baldwini Cope 1882
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Invalid names: Chriacus schlosserianus Cope 1888 [synonym], Chriacus truncatus Cope 1884 [synonym], Metachriacus provocator Simpson 1935 [synonym], Spanoxyodon latrunculus Simpson 1935 [synonym], Tricentes crassicollidens Cope 1884 [synonym]
†Conacodon kohlbergeri Archibald et al. 1983
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Invalid names: Conacodon utahensis Robison 1986 [synonym]
†Ectoconus ditrigonus Cope 1882
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Invalid names: Ectoconus majusculus Matthew 1937 [synonym]
†Ellipsodon grangeri Wilson 1956
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Invalid names: Ellipsodon witkoi Van Valen 1978 [synonym], Ellipsodon yotankae Van Valen 1978 [synonym]
†Litomylus dissentaneus Simpson 1935
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Invalid names: Litomylus osceolae Van Valen 1978 [synonym]
†Loxolophus hyattianus Cope 1885
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Invalid names: Mimotricentes mirielae Van Valen 1978 [synonym]
†Loxolophus pentacus Cope 1888
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Invalid names: Chriacus ruetimeyerianus Cope 1888 [synonym]
†Mioclaenus turgidus Cope 1881
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Invalid names: Mioclaenus lydekkerianus Cope 1888 [synonym]
†Mixodectes malaris Cope 1884
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Invalid names: Oxyacodon tecumsae Van Valen 1978 [synonym]
†Mixodectes pungens Cope 1883
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Invalid names: Mixodectes crassiusculus Cope 1883 [synonym]
†Oxyacodon agapetillus Cope 1884
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Invalid names: Fimbrethil ambaronae Van Valen 1978 [synonym]
†Oxyclaenus simplex Cope 1884
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Invalid names: Mioclaenus filholianus Cope 1888 [synonym]
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Invalid names: Catathlaeus rhabdodon Cope 1881 [synonym], Periptychus gilmorei Gazin 1938 [synonym], Periptychus superstes Matthew 1935 [synonym]
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Invalid names: Protogonia plicifera Cope 1882 [synonym]