Into which classes are mollusc divided? What are some representing beings of each class?
The phylum Mollusca is separated into five major classes: pelecypods, or bivalves (Pelecypoda, or Bivalvia), includes clams, oysters, mussels; gastropods (Gastropoda), snails, sea slugs; cephalopods (Cephalopoda), squids, octopuses; scaphopods (Scaphopoda), tooth shells; Polyplacophora, chitons. There are a some other mollusc classes.