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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Neoptera
                       [Endopterygota]
                       [Exopterygota]
                    Coleoptera
                      Polyphaga
                        Scarabeiformia
                          Scarabaeoidea
                            Passalidae
                              Aulacocyclinae
                              Passalinae
                                     Passalus
                                             Passalus punctiger
                                     Popilius
                                             Popilius disjunctus
                                     Ptichopus
                                             Ptichopus angulatus