Mammaliaformes Rowe 1988
Ref: M.C. McKenna & S.K. Bell, 1997: 511; Count: [g†g] 1c;24o;125f;1081g; ‡1o;6f;43g; †24o;301f;4057g;1s
   [crown] Class Mammalia Linnaeus, 1758 - mammals
  Ref: M.C. McKenna & S.K. Bell, 1997: 35; Count: [g†g] 24o;125f;1081g; ‡1o;6f;43g; †21o;294f;4034g;1s
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
    Ref: M.C. McKenna & S.K. Bell, 1997: 36 [new rank]; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †21o;294f;4031g;1s
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
      Ref: M.C. McKenna & S.K. Bell, 1997: 43 [new rank]; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †20o;277f;3936g;1s
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
        Ref: M.C. McKenna & S.K. Bell, 1997: 43 [new position]; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †20o;274f;3932g
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
          Ref: M.C. McKenna & S.K. Bell, 1997: 45; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †18o;269f;3910g
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
            Ref: M.C. McKenna & S.K. Bell, 1997: 48; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †16o;262f;3884g
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
              Ref: M.C. McKenna & S.K. Bell, 1997: 48 [new rank]; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †16o;258f;3877g
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                Ref: M.C. McKenna & S.K. Bell, 1997: 49 [new rank]; Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †16o;256f;3874g
                   Cohort Placentalia Owen, 1837 - placentals
                  Ref: M.C. McKenna & S.K. Bell, 1997: 80 [new rank]; Count: [g†g] 17o;108f;1005g; ‡1o;5f;40g; †12o;218f;3610g
                     Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
                    Ref: M.C. McKenna & S.K. Bell, 1997: 102 [new rank]; Count: [g†g] 15o;103f;992g; ‡4f;34g; †12o;208f;3390g
                       Superorder Preptotheria McKenna, 1975
                      Ref: M.C. McKenna & S.K. Bell, 1997: 104 [new position]; Count: [g†g] 15o;103f;992g; ‡4f;34g; †12o;204f;3358g
                         Grandorder Ungulata Linnaeus, 1766
                        Ref: M.C. McKenna & S.K. Bell, 1997: 357; Count: [g†g] 5o;29f;136g; ‡1f;9g; †9o;106f;1533g
                           Mirorder Eparctocyona McKenna, 1975
                          Ref: M.C. McKenna & S.K. Bell, 1997: 358; Count: [g†g] 2o;21f;122g; ‡2g; †3o;54f;939g
                             Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
                            Ref: M.C. McKenna & S.K. Bell, 1997: 391; Count: [g†g] 10f;82g; ‡2g; †27f;599g
                               Suborder Suiformes Jaeckel, 1911 see Suborder Suina Gray, 1868
                              Ref: M.C. McKenna & S.K. Bell, 1997: 391-392; Count: [g†g] 3f;9g; †15f;239g
                                 Superfamily †Anoplotherioidea Gray, 1821
                                Ref: M.C. McKenna & S.K. Bell, 1997: 406; Count: [†g] †3f;17g
                                   Family †Cainotheriidae Cope, 1881
                                  Ref: M.C. McKenna & S.K. Bell, 1997: 407; Count: [†g] †6g
                                     1 Subfamily †Oxacroninae Hürzeler, 1936
                                    Ref: M.C. McKenna & S.K. Bell, 1997: 407; Count: [†g] †2g
                                     2 Subfamily †Cainotheriinae Cope, 1881
                                    Ref: M.C. McKenna & S.K. Bell, 1997: 407; Count: [†g] †4g