Class Mammalia Linnaeus, 1758 - mammals
   Order †Docodonta Kretzoi, 1946, incertae sedis - docodonts
     Family †Docodontidae Simpson, 1929
       1 Genus †Docodon Marsh, 1881
       2 Genus †Borealestes Waldman & Savage, 1972 [monotypic]
       3 Genus †Cyrtlatherium Freeman, 1979 [monotypic]
       4 Genus †Haldanodon Kühne & Krusat, 1972 [monotypic]
       5 Genus †Simpsonodon Kermack, Lee, Lees & Mussett, 1987 [monotypic]
       6 Genus †Tegotherium Tatarinov, 1994 [monotypic]