After Savage, 1978, McKenna & Bell, 1997, and Gunnell, 1998

<==o †Oxyaenidae Cope, 1877 [Oxyaenoidea Osborn, 1910]
   |?- †Mechaeroidinae sensu Gunnell, 1998 [Hyaenodontidae: Limnocyoninae: Mechaeroidini sensu McKenna & Bell, 1997]
   `--+--o †Oxyaeninae Cope, 1877 [Oxyaenidae Cope, 1877;  Oxyaeninae Trouessart, 1885]
      |  |--o †Dipsalidictides Matthew, 1915; E.Eoc. NAm.
      |  |  |-- †D. platypus Matthew, 1915
      |  |  |-- †D. aequidens (Matthew, 1915) Gunnell & Gingerich, 1991 [Oxyaena aequidens Matthew, 1915]
      |  |  |-- †D. transiens (Matthew, 1915) Gunnell & Gingerich, 1991 [Oxyaena transiens Matthew, 1915]
      |  |  `-- †D. krausei Gunnell & Gingerich, 1991
      |  `--+--o †Oxyaena Cope, 1874 [Dipsalidictis Matthew, 1915] L.Pal.-E.Eoc. NAm., E.Eoc. Eu.
      |     |  |-- †O. lupina Cope, 1874
      |     |  |-- †O. gulo Matthew, 1915
      |     |  |-- †O. forcipata Cope, 1874
      |     |  |-- †O. intermedia Denison, 1938
      |     |  |-- †O. pardalis Matthew, 1915
      |     |  |-- †O. simpsoni Van Valen, 1966
	  |     |  `-- †O. woutersi (Lange-Badré & Godinot, 1982) [Arfia woutersi Lange-Badré & Godinot, 1982]
      |     `--+-- †Sarkastodon mongoliensis Granger, 1938; M.Eoc. EAs.
      |        |-- †Protopsalis tigrinus Cope, 1880
      |        `--o †Patriofelis Leidy, 1870a [incl.? Limnofelis Marsh, 1872; Oreocyon Marsh, 1872 [non Oreocyon Krumbiegel, 1949 (a canid)]; Aelurotherium Adams 1896] [incl. Argillotherium Davies, 1884]
      |           |-- †P. ulta Leidy, 1870a
      |           |-- †P. ferox (Marsh, 1872) 
      |           `-- †P. coloradensis
      `--+?-o †Tytthaeninae Gunnell & Gingerich, 1991
         |  `--o †Tytthaena Gingerich, 1980; L.Pal. NAm.
         |     |-- †T. parrisi Gingerich, 1980
         |     `-- †T. lichna (Rose, 1981)
         `--o †Ambloctoninae Cope, 1877 [Ambloctonidae Cope, 1877; Amphicreodi Gregory & Hellman, 1939] [incl. Palaeonictidae Osborn, 1892; Palaeonictida Haeckel, 1895; Palaeonictinae Denison, 1938]
            |--o †Dipsalodon Jepsen, 1930b; L.Pal. NAm.
            |  |-- †D. matthewi Jepsen, 1930b
            |  `-- †D. churchillorum Rose, 1981
            `--+--o †Ambloctonus Cope, 1875 [Amblyctonus Cope, 1880; Amblyctomus Cope, 1882] E.Eoc. NAm.
               |  |-- †A. sinosus Cope, 1875
               |  |-- †A. major
               |  `-- †A. hyaenoides
               `--o †Palaeonictis Blainville, 1842 [incl. Dormaalodon Lange-Badré, 1987] L.Pal.-E.Eoc. NAm., E.Eoc. Eu.
                  |-- †P. gigantea Blainville, 1842 [Dormaalodon woutersi Lange-Badré, 1987]
                  |-- †P. occidentalis Osborn, 1892
                  |-- †P. peloria Rose, 1981
                  `-- †P. wingi Chester, Bloch, Secord & Boyer, 2010

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