Central Taxonomic Thesaurus

Taxon Search
  Animalia
      Mollusca
            Gastropoda
                    Pulmonata
                            Planorbidae
                                     Amphigyra
                                     Biomphalaria
                                     Drepanotrema
                                     Gyraulus
                                     Helisoma
                                     Menetus
                                     Micromenetus
                                     Neoplanorbis
                                     Pecosorbis
                                     Planorbella
                                     Planorbula
                                     Promenetus
                                     Vorticifex