Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
Count: [g†g] 1c;24o;125f;1081g; ‡1o;6f;43g; †24o;301f;4057g;1s
   [crown] Class Mammalia Linnaeus, 1758 - mammals
  Count: [g†g] 24o;125f;1081g; ‡1o;6f;43g; †21o;294f;4034g;1s
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
    Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †21o;294f;4031g;1s
       Infraclass †Allotheria Marsh, 1880 see Clade Allotheria Marsh 1880
      Count: [†g] †1o;14f;78g
         Order †Multituberculata Cope, 1884
        Count: [†g] †14f;78g
           Suborder †Cimolodonta McKenna, 1975
          Count: [†g] †6f;51g
             Superfamily †Ptilodontoidea Gregory & Simpson, 1926 (1887)
            Count: [†g] †2f;16g
               Family †Ptilodontidae Gregory & Simpson, 1926 (1887)
              Count: [†g] †14g
                 1 Subfamily †Neoplagiaulacinae Ameghino, 1890 see Family Neoplagiaulacidae Ameghino, 1890
                Count: [†g] †10g
                 2 Subfamily †Ptilodontinae Gregory & Simpson, 1926 (1887) see Family Ptilodontidae Gregory & Simpson, 1926 (1887)
                Count: [†g] †4g