Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Dinosauria Owen, 1841 see Clade Dinosauria Owen 1842 [Langer, Novas, Bittencourt, Ezcurra & Gauthier 2020]
       1 Subclass †Saurischia Seeley, 1887 see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
       2 Subclass †Ornithischia Seeley, 1887 see Order Ornithischia Seeley, 1887
       3 Subclass Aves Linnaeus, 1758