Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
Count: [*†*] 6o;1f;14g; †7o;26f;156g;4s
   Metatheria Huxley 1880 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Metatheria Huxley, 1880
  Count: [*†*] 6o;1f;14g; †6o;26f;143g;4s
     Marsupialiformes Vullo, Gheerbrant, de Muizon & Néraudeau, 2009
    Count: [*†*] 6o;1f;14g; †5o;25f;134g;4s
       Order †Archimetatheria Szalay, 1994
      Count: [†*] †3f;16g;2s [28 Mar 2022]
         Superfamily †Pediomyoidea Simpson, 1927
        Count: [†*] †2f;8g;2s [28 Mar 2022]
           Family †Pediomyidae Simpson, 1927
          Count: [†*] †5g;1s [28 Mar 2022]
             Genus †Pediomys Marsh, 1889
            Count: -