Mammaliaformes Rowe 1988
   [crown clade] Mammalia Linnaeus, 1758 - mammals
     Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       †Allotheria Marsh, 1880 see Clade Allotheria Marsh 1880
         †Multituberculata Cope, 1884
           †Cimolodonta McKenna, 1975
             †Ptilodontoidea Gregory & Simpson, 1926 (1887)
               1 †Cimolodontidae Marsh, 1889
               2 †Ptilodontidae Gregory & Simpson, 1926 (1887)