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Organism
  Animalia
         [Metazoa]
      Cnidaria
            Hydrozoa
                   [Leptolida]
              Hydroidolina
                     [Hydroida]
                     [Hydroidomedusae]
                     [Leptolinae]
                    Anthoathecata
                           [Athecata]
                           [Gymnoblastea]
                           [Laingiomedusae]
                      Aplanulata
                            Boreohydridae
                                     Psammohydra