Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
       Supercohort Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
         Cohort Edentata Cuvier, 1798
           Order †Palaeanodonta Matthew, 1918
             Family †Epoicotheriidae Simpson, 1927
               Subfamily †Epoicotheriinae Simpson, 1927
                 Genus †Xenocranium Colbert, 1942
                   †Xenocranium pileorivaleᵀ Colbert, 1942