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Organism
  Bacteria
    Gracilicutes
      Cyanobacteria
            Cyanophyceae
              Nostocophycideae
                    Nostocales
                            Microchaetaceae
                              Tolypotrichoideae
                                     Petalonema
                                             Petalonema alatum
                                                   [Scytonema alatum]