Gastropoda
      Heterobranchia
            Opisthobranchia
                  Nudibranchia
                              Aeolidioidea
                                    Aeolidiidae
                                    Facelinidae
                                    Favorinidae
                                    Flabellinidae
                                    Glaucidae
                              Arminoidea
                                    Arminidae
                              Dendronotoidea
                                    Dendronotidae
                                    Dotidae
                                    Embletoniidae
                                    Lomanotidae
                                    Tethyidae
                              Doridoidea
                                    Archidorididae
                                    Cadlinidae
                                    Chromodorididae
                                    Discodorididae
                                    Dorididae
                                    Geitodorididae
                                    Rostangidae
                              Fionoidea
                                    Fionidae
                                    Tergipedidae
                              Onchidoridoidea
                                    Corambidae
                                    Goniodorididae
                                    Onchidorididae
                              Phyllidioidea
                                    Dendrodorididae
                                    Phyllidiidae
                              Polyceroidea
                                    Gymnodorididae
                                    Hexabranchidae
                                    Polyceridae
                              Tritonioidea
                                    Bornellidae
                                    Phylliroidae
                                    Scyllaeidae
                                    Tethydidae
                                    Tritoniidae