Stephanoceras (Normannites) orbignyi S. Buckman.
Matrix free specimen. Developed to centre one side. Sows incredible pair of long dangling lappets at the termination of the body chamber. Lappets like this rarely preserve. This one is exceptional.
Jurassic, Bajocian. Humphriesianum Zone.
Oborne Wood, Sherborne, Dorset.
Ammonite : 4.5 cm diam.