Class Mammalia Linnaeus, 1758 - mammals
Count: [f†f] 27o;160f; ‡7f [21 Jun 2022]
   Subclass Theria Parker & Haswell, 1897
  Count: [f†f] 26o;158f; ‡7f [21 Jun 2022]
     Infraclass Metatheria Huxley, 1880
    Count: [f†f] 7o;19f; ‡2f [7 Jun 2022]
       Order Microbiotheria Ameghino, 1889 [monotypic]
      Count: [f] 1f [7 Jun 2022]
         Family Microbiotheriidae Ameghino, 1887
        Count: -