Class Mammalia Linnaeus, 1758 - mammals
   Subclass †Allotheria Marsh, 1880
     Order †Multituberculata Cope, 1884
       Suborder †Cimolodonta McKenna, 1975
         Family †Cimolomyidae Marsh, 1889, incertae sedis
           Genus †Cimolomysᵀ Marsh, 1889
             1 †Cimolomys gracilisᵀ Marsh, 1889
             2 †Cimolomys clarki Sahni, 1972
             3 †Cimolomys major Russell, 1937
             4 †Cimolomys milliensis Eaton, 1993
             5 †Cimolomys trochuus Lillegraven, 1969