Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
Count: [*†*] 6o;1f;14g; †7o;26f;156g;4s
   "Eutheria" Gill 1872 [O'Leary, Allard, Novacek, Meng & Gatesy 2004] see Infraclass Eutheria Gill, 1872
  Count: [†*] †12g
     1.1 Genus †Prokennalestes Kielan-Jaworowska & Dashzeveg, 1989
    Count: -
     1.2 Genus †Juramaia Luo, Yuan, Meng & Ji, 2011
    Count: -
     2.1 Genus †Kermackia Slaughter, 1971
    Count: -
     2.2.1 Genus †Holoclemensia Slaughter, 1968
    Count: -
     2.2.2.1.1 Genus †Kennalestes Kielan-Jaworowska, 1968
    Count: -
     2.2.2.1.2 Genus †Asioryctes Kielan-Jaworowska, 1975
    Count: -
     2.2.2.2.1 Genus †Maelestes Wible, Rougier, Novacek & Asher, 2007
    Count: -
     2.2.2.2.2.1.1 Genus †Protungulatum Sloan & Van Valen, 1965
    Count: -
     2.2.2.2.2.1.2 Genus †Aspanlestes Nessov, 1985
    Count: -
     2.2.2.2.2.2.1 Genus †Kulbeckia Nessov, 1993
    Count: -
     2.2.2.2.2.2.2.1 Genus †Zofialestes Fostowicz-Frelik, 2016
    Count: -
     2.2.2.2.2.2.2.2 Genus †Zalambdalestes Gregory & Simpson, 1926
    Count: -