Class Reptilia Linnaeus, 1758 - reptiles
Count: [*†*] 4o;47f; †14o;194f [5 Jan 2017]
   Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
  Count: [*†*] 1o;1f; †4o;104f [4 Jan 2017]
     1 Order †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869
    Count: [†*] †13f [4 Jan 2017]
     2 Order Crocodylia Wagler, 1830 - crocodiles
    Count: [*†*] 1f; †18f [4 Jan 2017]
     3 Order †Saurischia Seeley, 1887 see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
    Count: [†*] †34f [4 Jan 2017]
     4 Order †Ornithischia Seeley, 1887
    Count: [†*] †20f [4 Jan 2017]
     5 Order †Pterosauria Kaup, 1834 - pterosaurs
    Count: [†*] †19f [4 Jan 2017]