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Organism
  Animalia
         [Metazoa]
      Cnidaria
            Anthozoa
              Octocorallia
                     [Alcyonaria]
                    Pennatulacea
                      Sessiliflorae
                            Protoptilidae
                                     Distichoptilum
                                           [Helicoptilum]
                                           [Juncoptilum]
                                             Distichoptilum gracile
                                             Distichoptilum verrilli
                                     Protoptilum
                                             Protoptilum carpenteri
                                             Protoptilum thomsoni