Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
   Class Mammalia Linnaeus, 1758 - mammals
     Subclass Prototheria Gill, 1872 - monotremes
       Order †Multituberculata Cope, 1884
         1 Family †Haramiyidae Simpson, 1947
         2 Family †Ptilodontidae Gregory & Simpson, 1926 (1887)