Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758
   "Eutheria" Gill 1872 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Eutheria Gill, 1872
     1.1 Genus †Prokennalestes Kielan-Jaworowska & Dashzeveg, 1989
     1.2 Genus †Juramaia Luo, Yuan, Meng & Ji, 2011
     2.1 Genus †Kermackia Slaughter, 1971
     2.2.1 Genus †Holoclemensia Slaughter, 1968
     2.2.2.1.1 Genus †Kennalestes Kielan-Jaworowska, 1968
     2.2.2.1.2 Genus †Asioryctes Kielan-Jaworowska, 1975
     2.2.2.2.1 Genus †Maelestes Wible, Rougier, Novacek & Asher, 2007
     2.2.2.2.2.1.1 Genus †Protungulatum Sloan & Van Valen, 1965
     2.2.2.2.2.1.2 Genus †Aspanlestes Nessov, 1985
     2.2.2.2.2.2.1 Genus †Kulbeckia Nessov, 1993
     2.2.2.2.2.2.2.1 Genus †Zofialestes Fostowicz-Frelik, 2016
     2.2.2.2.2.2.2.2 Genus †Zalambdalestes Gregory & Simpson, 1926