Bivalves belong to the invertebrate phylum Mollusca, which also includes snails, squids, and octopuses.
Some well-known bivalves include clams, scallops, mussels, and oysters.
All bivalves are aquatic, encompassing both marine and fresh-water species.
They first appeared in the fossil record over 500 million years ago.

Bi-valve Unidentified. West Java, Indonesia. Pleistocene 2 million years old Packaged in a cellophane bag with an information card Card is 63x44mm. Aust. $10.00 each.

Bi-valve Unidentified. S bi01 West Java, Indonesia. Pleistocene 2 million years old Specimen is 50x33mm. Aust. $15.00 All sizes are approximate This is a one only fossil and may not be available.

Polished Bi-valve Unidentified. S bi11 Majunga, Madagascar. Jurassic 150 million years old Specimen is 37x35mm. Aust. $15.00 All sizes are approximate This is a one only fossil and may not be available. If you require a fossil bigger or smaller please e-mail us with your request.

Polished Bi-valve Unidentified. S bi10 Majunga, Madagascar. Jurassic 150 million years old Specimen is 40x40mm. Aust. $15.00 All sizes are approximate This fossil is sold, but we have another similar avaialbe.

Polished Bi-valve Mercenaria. S bi04 Mahajanga, Madagascar. Jurassic 150 million years old Specimen is 69x54mm. Aust. $30.00 All sizes are approximate This is a one only fossil and may not be available. If you require a fossil bigger or smaller please e-mail us with your request.

Scallop Chesapecten jeffersonius. S sc01 Yorktown Formation, Williamsburg, Virginia, U.S.A. Pliocene 4 million years old Specimen is 165x123mm. Aust. $75.00 All sizes are approximate This is a one only fossil and may not be available. If you require a fossil bigger or smaller please e-mail us with your request.