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Organism
  Animalia
      Annelida
            Clitellata
              Hirudinea
                Euhirudinea
                    Rhynchobdellida
                            Piscicolidae
                                     Branchellion
                                             Branchellion lobata
                                     Myzobdella
                                             Myzobdella lugubris
                                     Stibarobdella
                                             Stibarobdella macrothela
                                     Trachelobdella