Class Mammalia Linnaeus, 1758 - mammals
Count: [*†*] 5o; †16o;76f;282g;438s
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
  Count: [*†*] 4o; †5o;24f;82g;141s
     Infraclass Eutheria Gill, 1872
    Count: [*†*] 2o; †3o;12f;40g;62s
       1 Genus †Eomaia Ji, Luo, Yuan, Wible, Zhang & Georgi, 2002, incertae sedis [monotypic]
      Count: [†*] †1s [25 Apr 2022]
       2 Genus †Montanalestes Cifelli, 1999, incertae sedis [monotypic]
      Count: [†*] †1s [25 Apr 2022]
       3 Family †Otlestidae Nessov, 1985, incertae sedis
      Count: [†*] †3g;4s [25 Apr 2022]
       4 Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
      Count: [*†*] 2o; †3o;11f;35g;56s