Myoida
                              Gastrochaenoidea
                                    Gastrochaenidae
                              Hiatelloidea
                                    Hiatellidae
                              Myoidea
                                    Corbulidae
                                    Erodonidae
                                    Myidae
                              Pholadoidea
                                    Pholadidae
                                    Teredinidae
                  Veneroida
                              Arcticoidea
                                    Arcticidae
                                    Trapezidae
                              Cardioidea
                                    Cardiidae
                              Carditoidea
                                    Carditidae
                                    Condylocardiidae
                              Chamoidea
                                    Chamidae
                              Chlamydoconchoidea
                                    Chlamydoconchidae
                              Corbiculoidea
                                    Sphaeriidae
                              Crassatelloidea
                                    Astartidae
                                    Crassatellidae
                              Cyamioidea
                                    Basterotiidae
                                    Cyamiidae
                                    Neoleptonidae
                                    Sportellidae
                                    Turtoniidae
                              Cyrenoidea
                                    Cyrenidae
                                    Glauconomidae
                              Dreissenoidea
                                    Dreissenidae
                              Galeommatoidea
                                    Galeommatidae
                                    Kelliidae
                                    Lasaeidae
                                    Montacutidae
                              Glossoidea
                                    Glossidae
                                    Kelliellidae
                                    Vesicomyidae
                              Lucinoidea
                                    Cyrenoididae
                                    Fimbriidae
                                    Lucinidae
                                    Mactromyidae
                                    Thyasiridae
                                    Ungulinidae
                              Mactroidea
                                    Anatinellidae
                                    Cardiliidae
                                    Mactridae
                                    Mesodesmatidae
                              Solenoidea
                                    Cultellidae
                                    Pharidae
                                    Solenidae
                              Tellinoidea
                                    Donacidae
                                    Psammobiidae
                                    Scrobiculariidae
                                    Semelidae
                                    Solecurtidae
                                    Tellinidae
                              Veneroidea
                                    Cooperellidae
                                    Petricolidae
                                    Veneridae