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Organism
  Animalia
      Mollusca
            Gastropoda
              Heterobranchia
                Euthyneura
                  Hygrophila
                          Lymnaeoidea
                            Lymnaeidae
                              Lymnaeinae
                                     Lymnaea
                                Lymnaeinae incertae sedis
                                     Galba
                                           [Fossaria]
                                     Pseudosuccinea