Class Mammalia Linnaeus, 1758 - mammals
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
     Infraclass Eutheria Gill, 1872
       Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
         Superorder Ferae Linnaeus, 1758 see Grandorder Ferae Linnaeus, 1758
           Order Cimolesta McKenna, 1975
             Family †Cimolestidae Marsh, 1889
               Genus †Cimolestesᵀ Marsh, 1889
                 1 †Cimolestes incisusᵀ Marsh, 1889
                 2 †Cimolestes cerberoides Lillegraven, 1969 see Ambilestes cerberoides (Lillegraven, 1969)
                 3 †Cimolestes magnus Clemens & Russell, 1965 see Altacreodus magnus (Clemens & Russell, 1965)
                 4 †Cimolestes propalaeoryctes Lillegraven, 1969 see Scollardius propalaeoryctes (Lillegraven, 1969)
                 5 †Cimolestes stirtoni Clemens, 1973