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• Domain: Eukaryota () - Whittaker & Margulis,1978
  • Kingdom: Animalia () - Linnaeus, 1758 - animals
    • Subkingdom: Bilateria () - (Hatschek, 1888) Cavalier-Smith, 1983
      • Branch: Protostomia () - Grobben, 1908
        • Infrakingdom: Ecdysozoa () - Aguinaldo Et Al., 1997 Ex Cavalier-Smith, 1998
          • Superphylum: Panarthropoda () - Cuvier
            • Phylum: Arthropoda () - Latreille, 1829 - arthropods
              • Subphylum: Mandibulata () - Snodgrass, 1938
                • Infraphylum: Crustaceomorpha () - (Chernyshev, 1960)
                  • Superclass: Crustacea () - Pennant, 1777 - Crustaceans
                    • Epiclass: Eucrustacea ()
                      • Class: Maxillopoda () - Dahl, 1956
                        • Subclass: Thecostraca () - Gruvel, 1905
                          • Infraclass: Cirripedia () - Burmeister, 1834
                            • Superorder: Thoracica () - Darwin, 1854
                              • Order: Sessilia () - Lamarck, 1818
                                • Suborder: Balanomorpha () - Pilsbry, 1916 - Acorn Barnacles
                                  • Superfamily: Chthamaloidea () - Darwin, 1854
                                    • Family: Catophragmidae () - Utinomi, 1968
                                      • Subfamily: Chthamalinae ()
                                        • Genus: Chthamalus () - (Poli)
                                          • Specific name: antennatus
                                            • Scientific name: - Chthamalus antennatus