Stephanoceras (Normannites) orbignyi Buckman.
Beautifully preserved 3D Ammonite on block of matrix. Developed right to the centre Shows row of umbilical spines to perfection.
Jurassic, Bajocian, Humphriesianum Zone.
Oborne Wood, Sherborne, Dorset.
Ammonite : 5 cm diam.
