[Theria] Parker & Haswell 1897 [McKenna 1975] see Subclass Theria Parker & Haswell, 1897
   Eutheria Gill 1872 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Eutheria Gill, 1872
     Boreoeutheria Springer & de Jong 2001 see Magnorder Boreoeutheria Springer & de Jong, 2001
       Laurasiatheria Waddell, Okada & Hasegawa 1999 see Superorder Laurasiatheria Waddell, Okada & Hasegawa, 1999
         [Fereuungulata Waddell, Cao, Hauf & Hasegawa 1999]
           [Euungulata Waddell, Kishino & Ota 2001] see Grandorder Euungulata Waddell, Kishino & Ota, 2001