Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
   Metatheria Huxley 1880 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Metatheria Huxley, 1880
     Marsupialiformes Vullo, Gheerbrant, de Muizon & Néraudeau, 2009
       Order †Archimetatheria Szalay, 1994
         Superfamily †Pediomyoidea Simpson, 1927
           Family †Pediomyidae Simpson, 1927
             †"Protolambda" clemensi (Sahni, 1972)