Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
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] †Polydolopimorphia Archer, 1984
      Count: [†*] †4f;20g
         [Suborder] †Bonapartheriformes Carneiro, Oliveira & Goin, 2018, orth. inval. see Suborder Bonapartheriiformes Goin & Candela, 2004
        Count: [†*] †2f;14g
           Superfamily †Bonapartherioidea Goin & Candela, 2004
          Count: [†*] †3g
             Genus †Gashternia Simpson, 1935
            Count: -