Nautilida
                              Nautiloidea
                                    Nautilidae
                  Octopoda
                                    Argonautidae
                                    Octopodidae
                  Sepiida
                                    Sepiadariidae
                                    Sepiidae
                                    Sepiolidae
                                    Spirulidae
                  Teuthida
                        Myopsida
                                    Loliginidae
                        Oegopsida
                                    Enoploteuthidae
                                    Neoteuthidae
                                    Ommastrephidae
                                    Onychoteuthidae
                  Vampyromorpha
                                    Vampyroteuthidae