Class Reptilia Linnaeus, 1758 - reptiles
Count: [*†*] 4o;47f; †14o;194f [5 Jan 2017]
   Subclass Lepidosauria Duméril & Bibron, 1839
  Count: [*†*] 2o;35f; †1o;16f [4 Jan 2017]
     Order †Eosuchia Broom, 1914 see Clade Eosuchia Broom 1914 [Laurin 1991]
    Count: [†*] †8f [4 Jan 2017]
       Suborder †Champsosaurida
      Count: [†*] †2f [4 Jan 2017]
         1 Family †Champsosauridae Cope, 1884
        Count: -
         2 Family †Pachystropheidae Kuhn, 1961
        Count: -