Epophioceras longicella Quenstedt.
This species is not at all easy to come by having a restricted distribution. Positive / negative. Complete to the centre. Small area of broken shell on the outer whorl most likely the result of a bite from a fish or shark.
Jurassic, Upper Sinemurian, Obtusum Zone.
Black Ven, Charmouth, Dorset.
Ammonite : 2.4 cm diam.
