Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Vertebrata Cuvier, 1812 - vertebrates
       1 Class Agnatha Cope, 1889
       2 Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       3 Class Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
       4 Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825
       5 Class Reptilia Linnaeus, 1758 - reptiles
       6 Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
       7 Class Mammalia Linnaeus, 1758 - mammals