Into which classes are mollusc divided? What are some representing beings of each class?

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