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• Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes
  • Kingdom: Animalia () - C. Linnaeus, 1758 - animals
    • Subkingdom: Bilateria () - (Hatschek, 1888) Cavalier-Smith, 1983
      • Branch: Deuterostomia () - Grobben, 1908
        • Infrakingdom: Chordonia () - (Haeckel, 1874) Cavalier-Smith, 1998
          • Phylum: Chordata () - Bateson, 1885 - Chordates
            • Subphylum: Vertebrata () - Cuvier, 1812 - Vertebrates
              • Infraphylum: Gnathostomata () - auct. - Jawed Vertebrates
                • Superclass: Tetrapoda () - Goodrich, 1930
                  • Class: Reptilia () - Reptiles
                    • Subclass: Diapsida ()
                      • Infraclass: Lepidosauromorpha ()
                        • Superorder: Lepidosauria () -  
                          • Order: Squamata ()
                            • Suborder: Lacertilia ()
                              • Infraorder: Iguania ()
                                • Family: Phrynosomatidae ()
                                  • Genus: Holbrookia ()
                                    • Specific name: undulatus
                                      • Scientific name: - Holbrookia undulatus