Kingdom [Animalia] Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Vertebrata Cuvier, 1812 - vertebrates
       Class Mammalia Linnaeus, 1758 - mammals
         Subclass Prototheria Gill, 1872 - monotremes
           Infraclass †Eotheria (Kermack & Mussett, 1958)
             Order †Docodonta Kretzoi, 1946 - docodonts
             1 Order †Triconodonta Osborn, 1888