Class Reptilia Linnaeus, 1758 - reptiles
   Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
     Order †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869
       1 Suborder †Proterosuchia Broom, 1906 see Order Proterosuchia Broom, 1906
       2 Suborder †Aetosauria Nicholson & Lydekker, 1889 see Order Aetosauria Nicholson & Lydekker, 1889
       3 Suborder †Pseudosuchia Zittel, 1887-1890 [paraphyletic?]
       4 Suborder †Parasuchia Huxley, 1875 [monotypic]