Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Reptilia Linnaeus, 1758 - reptiles
               Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
                 Order Crocodylia Wagler, 1830 - crocodiles
                   Suborder †Thalattosuchia Fraas, 1901 [monotypic] see Order Thalattosuchia Fraas, 1901
                     Family †Metriorhynchidae Fitzinger, 1843
                       Genus †Geosaurus Cuvier, 1824
                         †Geosaurus giganteus (Sömmering, 1816)