A class of the phylum Mollusca; bivalves including mussels, clams, and oysters.

A class of marine invertebrates in the phylum Mollusca. This class includes clams, oysters and mussels which all have a hatchet-shaped foot usually used for digging. All animals in this class are benthic and are usually either sessile or burrow in mud, rock or wood. Their soft parts ae enclosed in hinged shells and food is transported to the mouth via the action of cilia setting up currents. About four fifths of the known species are marine.

Same as Lamellibranchia.