Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Reptilia Linnaeus, 1758 - reptiles
       Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
         1 Order †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869
         2 Order †Saurischia Seeley, 1887 see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
         3 Order †Ornithischia Seeley, 1887
         4 Order †Pterosauria Kaup, 1834 - pterosaurs
         5 Order Crocodylia Wagler, 1830 - crocodiles