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Organism
  Animalia
      Mollusca
            Gastropoda
              Caenogastropoda
                    Littorinimorpha
                          Truncatelloidea
                            Vitrinellidae
                                     Circulus
                                             Circulus liratus
                                             Circulus multistriatus
                                             Circulus semisculptus
                                             Circulus texanus