#class_Bivalvia__Bivalvia__Lamellibranchia__class_Lamellibranchia__class_Pelecypoda  oysters; clams; scallops; mussels
  member:  #bivalve  #spat  #order_Myaceae  #family_Tridacnidae  #family_Cardiidae  #family_Ostreidae  #family_Pteriidae  #family_Anomiidae  #genus_Placuna  #family_Arcidae  #family_Mytilidae  #family_Unionidae  #family_Pectinidae  #family_Teredinidae  #family_Pholadidae
  member of:  #phylum_Mollusca
  supertype:  #class__clas  (biology) a taxonomic group containing one or more orders
     supertype:  #taxonomic_group__taxonomicgroup__taxon  animal or plant group having natural relations
        supertype:  #biological_group  a group of plants or animals
           supertype:  #group__grouping  any number of entities (members) considered as a unit
              supertype:  pm#collection  something gathering separated things (entities/situations)
                 supertype:  pm#divisible_entity__divisibleentity  many classifications under this category are application-dependant
                    supertype:  pm#entity  something that can be "involved" in a situation
                       supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                    supertype:  pm#divisible_thing__divisiblething
                       supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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