Class Mammalia Linnaeus, 1758 - mammals
Status: extant
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
  Status: extant
     Infraclass Metatheria Huxley, 1880
    Status: extant
       Cohort †Deltatheroida Kielan-Jaworowska, 1982 see Order Deltatheroida Kielan-Jaworowska, 1982
      Status: fossil
         Genus †Khuduklestes Nessov, Sigogneau-Russell & Russell, 1994, incertae sedis [monotypic]
        Status: fossil
           1 †Khuduklestes bohlini Nessov, Sigogneau-Russell & Russell, 1994
          Status: fossil