Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
Period: Late Triassic - Present [237 Mya - present]; Status: extant
   [crown] Class Mammalia Linnaeus, 1758 - mammals
  Period: Late Triassic - Present [237 Mya - present]; Status: extant
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
    Period: Late Triassic - Present [237 Mya - present]; Status: extant
       Infraclass †Allotheria Marsh, 1880 see Clade Allotheria Marsh 1880
      Period: Middle Jurassic - Late Eocene [174.1 - 33.9 Mya]; Status: fossil
         Order †Multituberculata Cope, 1884
        Period: Middle Jurassic - Late Eocene [174.1 - 33.9 Mya]; Status: fossil
           Suborder †Cimolodonta McKenna, 1975
          Status: fossil
             Superfamily †Ptilodontoidea Gregory & Simpson, 1926 (1887)
            Status: fossil
               Family †Ptilodontidae Gregory & Simpson, 1926 (1887)
              Distribution: Europe, Asia, North America; Period: Late Cretaceous - Late Eocene [100.5 - 33.9 Mya]; Status: fossil
                 Subfamily †Ptilodontinae Gregory & Simpson, 1926 (1887) see Family Ptilodontidae Gregory & Simpson, 1926 (1887)
                Status: fossil
                   1 Genus †Kimbetohia Simpson, 1936
                  Status: fossil
                   2 Genus †Ptilodus Cope, 1881
                  Status: fossil
                   3 Genus †Baiotomeus Krause, 1987
                  Status: fossil
                   4 Genus †Prochetodon Jepsen, 1940
                  Status: fossil