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Organism
  Animalia
      Mollusca
            Gastropoda
              Neritimorpha
                    Cycloneritida
                          Helicinoidea
                            Helicinidae
                              Helicininae
                                     Alcadia
                                             Alcadia dysoni
                                             Alcadia striata
                                     Helicina
                                             Helicina amoena
                                             Helicina beatrix
                                             Helicina coccinastoma
                                             Helicina dysoni
                                             Helicina flavida
                                             Helicina fragilis
                                             Helicina funcki
                                             Helicina heighwayana
                                             Helicina hondurana
                                             Helicina monteverdensis
                                             Helicina orbiculata
                                             Helicina oweniana
                                               Helicina oweniana anozona
                                                     [Helicina anozona]
                                             Helicina oxyrhyncha
                                             Helicina rostrata
                                             Helicina tenuis
                                             Helicina terryae
                                             Helicina turbinata
                                     Lucidella
                                             Lucidella lirata
                                             Lucidella midyetti
                                             Lucidella pilsbryi
                                     Potomapyrgus
                                             Potomapyrgus coronatur