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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Neoptera
                       [Endopterygota]
                       [Exopterygota]
                    Hymenoptera
                      Symphyta
                          Siricoidea
                            Siricidae
                                     Sirex
                                             Sirex cyaneus
                                     Tremex
                                             Tremex columba