Cretaceous bivalve


  • Cretaceous bivalve fossil Pterotrigonia
    Cretaceous bivalve fossil © Emily S. Damstra

Cretaceous bivalve fossil
Pterotrigonia (Trigonia) thoracica
Illustration of both valves and a life reconstruction

From the Coon Creek tongue of the Ripley Formation – Late Cretaceous, McNairy County, TN
The State Fossil of Tennessee