Bivalve shells

This gallery displays fossil bivalve shells from our collection. They are from the Lower Cretaceous period and around 85 million years old.  Bivalves first appeared in the fossil record around 500 million years ago.  They are animals that belong to the mollusc group and have two hinged shells and 15,000 species still live in our seas today including clams, mussels and scallops.