Class Mammalia Linnaeus, 1758 - mammals
   Subclass †Allotheria Marsh, 1880
     Order †Multituberculata Cope, 1884
       Suborder †Cimolodonta McKenna, 1975
         Superfamily †Ptilodontoidea Gregory & Simpson, 1926 (1887)
           Family †Cimolodontidae Marsh, 1889
             Genus †Cimolodonᵀ Marsh, 1889
               1 †Cimolodon nitidusᵀ Marsh, 1889
               2 †Cimolodon electus Fox, 1971
               3 †Cimolodon similis Fox, 1971