Gastropoda
      Heterobranchia
            Pulmonata
                  Basommatophora
                              Amphiboloidea
                                    Amphibolidae
                              Ancyloidea
                                    Acroloxidae
                                    Ancylidae
                                    Physidae
                                    Planorbidae
                              Chilinoidea
                                    Chilinidae
                                    Latiidae
                              Ellobioidea
                                    Carychiidae
                                    Ellobiidae
                                    Otinidae
                              Lymnaeoidea
                                    Lymnaeidae
                              Siphonarioidea
                                    Siphonariidae
                                    Trimusculidae