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Organism
  Animalia
      Echinodermata
        Echinozoa
            Echinoidea
              Euechinoidea
                Irregularia
                 Atelostomata
                    Spatangoida
                      Brissidina
                            Brissidae
                              Brissopsinae
                                     Brissopsis
                                             Brissopsis atlantica
                                             Brissopsis elongata
                                               Brissopsis elongata elongata