Mammaliaformes Rowe 1988
   [crown] Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
     Theriimorpha Rowe 1993
       1.1.1[4] †unnamed Dryolestida Prothero 1981 see Order Dryolestida Prothero, 1981
       1.1.2 †Henkelotherium guimarotae Krebs, 1991
       1.2.1[5] †Spalacotherium tricuspedens O'Leary, Bloch, Flynn, Gaudin, Giallombardo, Giannini, Goldberg, Kraatz, Luo, Meng, Ni, Novacek, Perini, Randall, Rougier, Sargis, Silcox, Simmons, Spaulding, Velazco, Weksler, Wible & Cirranello, 2013, orth. inval. see Spalacotherium tricuspidens Owen, 1854
       1.2.2 †Zhangheotherium quinquecuspidens Hu, Wang, Luo & Li, 1997
       2.1 †Eomaia scansoria Ji et al., 2002
       2.2 [crown] Theria Parker & Haswell 1897 [McKenna 1975] see Subclass Theria Parker & Haswell, 1897