Class Mammalia Linnaeus, 1758 - mammals
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
     Infraclass Eutheria Gill, 1872
       1 Genus †Eomaia Ji, Luo, Yuan, Wible, Zhang & Georgi, 2002, incertae sedis [monotypic]
       2 Genus †Montanalestes Cifelli, 1999, incertae sedis [monotypic]
       3 Family †Otlestidae Nessov, 1985, incertae sedis
       4 Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837