Bivalvia
      Pteriomorphia
                  Arcoida
                              Arcoidea
                                    Arcidae
                                    Cucullaeidae
                                    Noetiidae
                                    Parallelodontidae
                              Limopsoidea
                                    Glycymerididae
                                    Limopsidae
                                    Manzanellidae
                                    Philobryidae