Taxon Search
Organism
  Animalia
    Bilateria
     Protostomia
     Lophozoa
      Mollusca
            Gastropoda
                   [Orthogastropoda]
              Prosobranchia
                     [Parasita]
                    Neritopsina
                            Helicinidae
                                    Helicina
                        Orthalicoidei
                          Orthalicoidea
                            Simpulopsidae
                                    Simpulopsis