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 Metatheria Huxley, 1880
    Count: 2o; †1o;7f;26g;62s
       Cohort Marsupialia Jameson, 1818 - marsupials
      Count: 2o; †1o;6f;19g;54s
         Superorder "Ameridelphia" Szalay, 1982 [paraphyletic] see Clade Ameridelphia Szalay 1982
        Count: 2o; †1o;6f;19g;54s
           Order †Asiadelphia Trofimov & Szalay, 1993 [monotypic]
          Count: [†*] †1f;2g;2s [24 Apr 2022]
             Family †Asiatheriidae Trofimov & Szalay, 1994
            Count: [†*] †2g;2s [24 Apr 2022]
               1 Genus †Asiatheriumᵀ Trofimov & Szalay, 1994 [monotypic]
              Count: [†*] †1s [24 Apr 2022]
               2 ?Genus †Marsasia Nessov, 1997 [monotypic] see Genus Sulestes Nessov, 1985
              Count: [†*] †1s [24 Apr 2022]