Gastropoda
      Heterobranchia
            Pulmonata
                  Stylommatophora
                              Pupilloidea
                                    Amastridae
                                    Argnidae
                                    Chondrinidae
                                    Cochlicopidae
                                    Enidae
                                    Hypselostomatidae
                                    Orculidae
                                    Pleurodiscidae
                                    Pupillidae
                                    Pyramidulidae
                                    Strobilopsidae
                                    Valloniidae
                                    Vertiginidae