[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Pentadactyla lipobranchia
               Branch Monocondyla
                 Class Reptilia Linnaeus, 1758 - reptiles
                   Subclass Ornithoscelida (Huxley, 1870)
                     1 Genus Megalosaurus Buckland, 1822
                     2 Genus Iguanodon Mantell, 1825
                     3 Genus Compsognathus Wagner, 1859