Xipheroceras dudriesieri (D'Orbigny).
Beautifully preserved 3D Ammonite on grey limestone. Developed to the protoconch. With drusy calcite crystals showing in one of the chambers.
Jurassic, Upper Sinemurian, Obtusum Zone.
Black Ven, Charmouth /Lyme Regis, Dorset.
Ammonite : 4.5 cm diam.
