Class Reptilia Linnaeus, 1758 - reptiles
   Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
     Order †Pterosauria Kaup, 1834 - pterosaurs
       Suborder †Pterodactyloidea Plieninger, 1901
         Family †Pteranodontidae Marsh, 1876
           1 Genus †Pteranodon Marsh, 1876
           2 Genus †Ornithostoma Seeley, 1871