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
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