Mollusca, phylum Mollusca - gastropods; bivalves; cephalopods; chitons

bivalve, lamellibranch, pelecypod - marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together

spat - a young oyster or other bivalve

Myaceae, order Myaceae - clams

family Tridacnidae, Tridacnidae - large marine hard-shell clams

Cardiidae, family Cardiidae - somewhat heart-shaped sand-burrowing bivalve mollusks

family Ostreidae, Ostreidae - oysters

family Pteriidae, Pteriidae - pearl oysters

Anomiidae, family Anomiidae - saddle oysters

genus Placuna, Placuna - windowpane oysters

Arcidae, family Arcidae - ark shells

family Mytilidae, Mytilidae - marine mussels

family Unionidae, Unionidae - freshwater mussels found worldwide

family Pectinidae, Pectinidae - scallops

family Teredinidae, Teredinidae - shipworms

family Pholadidae, Pholadidae - a family of Bivalvia

class - (biology) a taxonomic group containing one or more orders