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• Domain: Eukaryota () - Whittaker & Margulis,1978
  • Kingdom: Animalia () - Linnaeus, 1758 - animals
    • Subkingdom: Bilateria () - (Hatschek, 1888) Cavalier-Smith, 1983
      • Branch: Deuterostomia () - Grobben, 1908
        • Infrakingdom: Chordonia () - (Haeckel, 1874) Cavalier-Smith, 1998
          • Phylum: Chordata () - Bateson, 1885 - Chordates
            • Subphylum: Vertebrata () - Cuvier, 1812 - Vertebrates
              • Infraphylum: Gnathostomata () - Auct. - Jawed Vertebrates
                • Superclass: Tetrapoda () - Goodrich, 1930
                  • Class: Mammalia () - C. Linnaeus, 1758 - Mammals
                    • Subclass: Theriiformes () - (Rowe, 1988) M.c. Mckenna & S.k. Bell, 1997
                      • Infraclass: Allotheria () - (Marsh, 1880) Hopson, 1970
                        • Superlegion: Trechnotheria () - Mckenna, 1975
                          • Legion: Cladotheria () - Mckenna, 1975
                            • Sublegion: Zatheria () - Mckenna, 1975
                              • Infralegion: Tribosphenida () - (Mckenna, 1975) Mckenna & Bell, 1997:vii,48
                                • Supercohort: Theria () - (Parker & Haswell, 1897) Mckenna & Bell, 1997:viii,49
                                  • Cohort: Placentalia () - (Owen, 1837) Mckenna & Bell, 1997:viii,80
                                    • Superorder: Preptotheria () - (Mckenna, 1975) Mckenna in Stucky & Mckenna in Benton, Ed., 1993:7
                                      • Grandorder: Ungulata () - (Linnaeus, 1766) Mckenna, 1975:41
                                        • Mirorder: Eparctocyona () - Mckenna, 1975
                                          • Order: Therapsida () - Cope, 1884
                                            • Suborder: Cimolodonta () - (Mckenna, 1975) Kielan-Jaworowska & Nessov, 1992
                                              • Superfamily: Ptilodontoidea () - (Cope, 1887) M.c. Mckenna & S.k. Bell, 1997
                                                • Family: Ptilodontidae ()
                                                  • Genus: Xanclomys ()
                                                    • Specific name: mcgrewi
                                                      • Scientific name: - Xanclomys mcgrewi