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Organism
  Chromista
         [Microbe]
  Plantae
      Chrysophyta
             [Algae]
            Bacillariophyceae
                    Pennales
                            Rhoicospheniaceae
                                     Gomphosphenia
                                             Gomphosphenia americana
                                             Gomphosphenia grovei
                                               Gomphosphenia grovei var. lingulata
                                             Gomphosphenia lingulatiformis
                                             Gomphosphenia praegnans
                                             Gomphosphenia stoermeri
                                             Gomphosphenia tackei
                                     Rhoicosphenia
                                             Rhoicosphenia abbreviata
                                             Rhoicosphenia californica