After Carroll, 1988, McKenna & Bell, 1997, Zonneveld, Gunnell & Bartels, 2000, and Alroy, 2002

<==o †Apatotheria Scott & Jepsen, 1936
   `--o †Apatemyidae Matthew, 1909
      |--o †Unuchinia Simpson, 1937 [†Apator Simpson, 1937 (non Apator Semenow, 1898, a beetle (Arthropoda: Insecta: Coeloptera)] [Unuchiinae Van Valen, 1966]
      |  |-- †U. asaphes (Simpson, 1936c) Simpson, 1937 [†Apator asaphes Simpson, 1936c; †Unuchinia asaphes Simpson, 1937, McKenna, 1963, Gunnell, 1988]
      |  |-- †U. diaphanes Gunnell, 1988
      |  `-- †U. dysmathes Holtzman, 1978
      `--o †Apatemyinae Matthew, 1909
         |?- †Eochiromys Teilhard de Chardin, 1927; L.Eoc. Eu.
         |?-o †Heterohyus Gervais, 1848 [incl.? †Necrosorex Filhol, 1890; †Heterochiromys Stehlin, 1916; †Amphichiromys Stehlin, 1916; †Gardomys Sigé, 1975; †Chardinyus sigé, 1975] [incl. †Gervaisyus Sigé, 1990] L.-U.Eoc. Eu.
         |  |-- †H. henfelderi
         |  `-- †H. nanus
         |?- †Sinclairella dakotensis Jepsen, 1934; U.Eoc.-U.Olig. NA.
         |-- †Jepsenella praepropera Simpson, 1940; L.-U.Paleoc. NA.
         `--o †Apatemys Marsh, 1872 sensu McKenna & Bell, 1997
            |--o †Labidolemur Matthew & Granger, 1921 [taxonomic history] M.Paleoc. NA.
            |  |-- †L. major West, 1972
            |  |-- †L. kayi Simpson, 1929a [taxonomic history]
            |  |-- †L. serus Gingerich, 1982e
            |  `-- †L. soricoides Matthew & Granger, 1921
            `--o †Apatemys Marsh, 1872 [taxonomic history] U.Paleoc.-M.Eoc. NA., L.Eoc. Eu.
               |-- †A. bellulus Marsh, 1872 [taxonomic history]
               |-- †A. bellus Marsh, 1872 [taxonomic history]
               |-- †A. rodens Troxell, 1923c [taxonomic history]
               |-- †A. chardini (Jepsen, 1930) Bown & Schankler, 1982 [taxonomic history]
               |-- †A. downsi Gazin, 1958a [taxonomic history]
               |-- †A. hendryi Robinson, 1966 [taxonomic history]
               `-- †A. uintensis (Matthew, 1921); Alroy, 2002 [taxonomic history]

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