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
       Cohort Placentalia Owen, 1837 - placentals
         Order Primates Linnaeus, 1758 - primates
           Suborder †Plesiadapiformes Simons & Tattersall, 1972
             Superfamily †Plesiadapoidea Trouessart, 1897
               1 Genus †Chronolestes Beard & Wang, 1995
               2 Family †Plesiadapidae Trouessart, 1897
               3 Family †Carpolestidae Simpson, 1935
               4 Family †Saxonellidae Russell, 1964