Fossil group

Mollusks

Molluscs · Cambrian – Recent

Soft-bodied invertebrates, usually protected by a calcareous shell — the vast group that includes bivalves, gastropods (snails) and cephalopods. They live in marine, freshwater and terrestrial settings and are among the commonest fossils from the Cambrian onward.

A broad fossil group rather than a single taxon — the units below record it among their fauna or flora.