Clade Mammaliaformes Rowe 1988 [Rowe 1988]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes (Rowe, 1988) M.C. McKenna & S.K. Bell, 1997 see Division Theriiformes
       Infraclass Holotheria (Wible et al., 1995) M.C. McKenna & S.K. Bell, 1997 see [unranked] Holotheria
         Superlegion Trechnotheria McKenna, 1975 see [unranked] Trechnotheria McKenna, 1975
           Legion Cladotheria McKenna, 1975 see [unranked] Cladotheria McKenna, 1975
             Sublegion Zatheria McKenna, 1975 see [unranked] Zatheria McKenna, 1975
               Infralegion Tribosphenida McKenna, 1975 see Sublegion Boreosphenida
                 Supercohort Theria (Parker & Haswell, 1897) M.C. McKenna & S.K. Bell, 1997 - therians see [unranked] Theria
                   Cohort Placentalia (Owen, 1837) M.C. McKenna & S.K. Bell, 1997 - placentals
                     Magnorder Epitheria (McKenna, 1975) M.C. McKenna & S.K. Bell, 1997 see Cohort Placentalia (Owen, 1837) M.C. McKenna & S.K. Bell, 1997
                       Superorder Preptotheria (McKenna, 1975) McKenna, 1993
                         Grandorder Ungulata Linnaeus, 1766
                           Mirorder Eparctocyona McKenna, 1975
                             Order Cete Linnaeus, 1758 see Order Cetartiodactyla Montgelard et al., 1997
                               Suborder †Acreodi Matthew, 1909 see Order Acreodi Matthew, 1909
                                 Family †Mesonychidae Cope, 1875
                                   01 Genus †Yantanglestes Ideker & Yan, 1980
                                   02 Genus †Hukoutherium Chow, Chang, Wang & Ting, 1973
                                   03 Genus †Dissacusium Zhou Zhang, Wang & Ding, 1977
                                   04 Genus †Ankalagon van Valen, 1980
                                   05 Genus †Sinonyx Zhou, Zhai, Gingerich & Chen, 1995
                                   06 Genus †Dissacus Cope, 1881
                                   07 Genus †Pachyaena Cope, 1874
                                   08 Genus †Jiangxia
                                   09 Genus †Mongolonyx
                                   10 Genus †Harpagolestes Wortman, 1901
                                   11 Genus †Hessolestes Peterson, 1931
                                   12 Genus †Synoplotherium Cope, 1872
                                   13 Genus †Mesonyx Cope, 1872
                                   14 Genus †Guilestes Zheng & Chi, 1978
                                   15 Genus †Mongolestes Szalay & Gould, 1966