Anadara sp.
Other Mollusc
Miocene
Wettendorf Formation
Muter-Torlon, Germany

Excellent 0.8 inch clam.

Anadara is a genus of marine clams of the bivalve family, Arcidae.  It dates back to the Early Cretaceous and still lives today.  It is perhaps best-known in fossil form from the Miocene-Pleistocene of just about everywhere clams have been found.