Graphoceras sp.
Matrix free specimen. Developed to centre on one side. The keel is very much off centre so that one side of the Ammonite is much thicker than the other. This must have resulted in a certain degree of lopsidedness when swimming .but the Ammonite survived to maturity. Fantastic example.
Jurassic, Aalenian.
Horn Park Quarry, Beaminster, Dorset.
Ammonite : 5 cm diam.
