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• Domain: Eukaryota () - Whittaker & Margulis,1978
  • Kingdom: Animalia () - Linnaeus, 1758 - 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 - Latreille, 1829 - arthropods
              • Subphylum: mandibulata () - snodgrass, 1938
                • Infraphylum: Atelocerata () - Heymons, 1901
                  • Superclass: Panhexapoda ()
                    • Epiclass: Hexapoda ()
                      • Class: Insecta () - c. linnaeus, 1758 - Insects
                        • Subclass: Dicondylia ()
                          • Infraclass: Pterygota ()
                            • Order: Coleoptera () - c. linnaeus, 1758
                              • Suborder: Polyphaga () - Emery, 1886
                                • Infraorder: Scarabaeiformia ()
                                  • Superfamily: Hydrophiloidea ()
                                    • Family: Histeridae ()
                                      • Subfamily: Abraeinae ()
                                        • Genus: Halacritus () - Schmidt
                                          • Specific name: instabilis
                                            • Scientific name: - Halacritus instabilis Marseul