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Organism
  Animalia
         [Metazoa]
      Arthropoda
        Crustacea
          Multicrustacea
            Thecostraca
              Cirripedia
                Thoracica
                    Pedunculata
                      Lepadomorpha
                            Oxynaspididae
                                     Oxynaspis
                                             Oxynaspis celata
                                             Oxynaspis floridana
                                             Oxynaspis gracilis
                                             Oxynaspis patens
                                             Oxynaspis rossi