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Organism
  Animalia
      Chordata
        Vertebrata
          Amniota
            Aves
                    Phaethontiformes
                            Phaethontidae
                                     Phaethon
                                             Phaethon aethereus
                                               Phaethon aethereus mesonauta
                                             Phaethon lepturus
                                               Phaethon lepturus catesbyi