Classification of Williamson 1996

Ellipsodon aequidens Matthew 1937
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Fm. Didelphidae [opossum]
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G. †Thylacodon Matthew and Granger 1921
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Thylacodon pusillus Matthew and Granger 1921
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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Adunator fredericki Rigby, Jr. 1980
Adunator martinezi Rigby, Jr. 1980
Invalid names: Mckennatherium Van Valen 1965 [synonym]
G. †Palaechthon Gidley 1923
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Palaechthon torrejonius Kay and Cartmill 1977
G. †Plesiolestes Jepsen 1930
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Plesiolestes wilsoni Gazin 1968
Invalid names: Torrejonia Gazin 1968 [synonym]
G. †Intyrictis Gingerich and Winkler 1985
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Intyrictis vanvaleni MacIntyre 1966
Fm. †Arctocyonidae Murray 1866 [condylarth]
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G. †Oxytomodon Gazin 1941
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Oxytomodon perissum Gazin 1941
G. †Arctocyon Blainville 1841
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Arctocyon ferox Cope 1883
Invalid names: Claenodon Scott 1892 [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 pentacus Cope 1888
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Invalid names: Chriacus ruetimeyerianus Cope 1888 [synonym]
Loxolophus priscus Cope 1888
Loxolophus spiekeri Gazin 1938
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Invalid names: Protogonodon biathales Gazin 1941 [synonym]
Loxolophus stenognathus Matthew 1897
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Invalid names: Protogonodon grangeri Simpson 1936 [synonym]
Invalid names: Protogonodon Scott 1892 [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. †Ellipsodon Scott 1892
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Ellipsodon sternbergi Gazin 1939
G. †Promioclaenus Trouessart 1904
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Invalid names: Jepsenia Gazin 1939 [synonym]
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. †Gillisonchus Rigby, Jr. 1981
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Invalid names: Anisonchus apiculatus Cope 1884 [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 hamaxitus Gazin 1941 [synonym], Plagioptychus matthewi Simpson 1936 [synonym]
Invalid names: Carsioptychus Simpson 1936 [synonym], Catathlaeus Cope 1881 [synonym], Plagioptychus Matthew 1936 [synonym]
G. †Eoconodon Matthew and Granger 1921
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Eoconodon coryphaeus Cope 1885
G. †Goniacodon Scott 1892
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Goniacodon levisanus Cope 1883
G. †Oxyclaenus Cope 1884
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Oxyclaenus antiquus Simpson 1936
Invalid names: Thangorodrim Van Valen 1978 [synonym]
G. †Triisodon Cope 1881
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Invalid names: Triisodon rusticus Cope 1884 [synonym]
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]
Anisonchus sectorius Cope 1881
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Invalid names: Anisonchus dracus Gazin 1939 [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], Oxyclaenus pearcei Gazin 1941 [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]
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Invalid names: Desmatoclaenus paracreodus Gazin 1941 [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]
Haploconus angustus Cope 1881
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Invalid names: Haploconus corniculatus Cope 1888 [synonym], Haploconus inopinatus Gazin 1939 [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]
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Invalid names: Tricentes elassus Gazin 1941 [synonym], Tricentes latidens Gidley 1935 [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 pugnax Simpson 1935
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Invalid names: Thangorodrim thalion Van Valen 1978 [synonym]
Oxyclaenus simplex Cope 1884
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Invalid names: Mioclaenus filholianus Cope 1888 [synonym]
Pantolambda intermedius Simpson 1935
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Invalid names: Titanoides simpsoni Simons 1960 [synonym]
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Invalid names: Catathlaeus rhabdodon Cope 1881 [synonym], Periptychus gilmorei Gazin 1938 [synonym], Periptychus superstes Matthew 1935 [synonym]
Prolimnocyon durini Van Valen 1978
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Invalid names: Prolimnocyon macfaddeni Rigby, Jr. 1980 [synonym]
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Invalid names: Ellipsodon aquilonius Simpson 1935 [synonym]
Promioclaenus lemuroides Matthew 1897
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Invalid names: Ellipsodon shepherdi Gazin 1939 [synonym], Jepsenia mantiensis Gazin 1939 [synonym]
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Invalid names: Protogonia plicifera Cope 1882 [synonym]
Triisodon quivirensis Cope 1881
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Invalid names: Sarcothraustes antiquus Cope 1882 [synonym], Triisodon conidens Cope 1882 [synonym]