Ancyloceras sp

Scale bar = 5cm

Description

Middle Jurassic, Inferior Oolite
Halfway House
Dorset
England
M1683
Description:

This is a type of heteromorph ammonite, i.e. it's shell is not spiraled like most members ofSubclass Ammoniodia, extinct free swimming predatory cephalopods (also in this image M1686 and M1684).
Moore, C.

Classification

Mollusca
Visceroconcha
Cephalopoda
Ammonoidea
Ammonoidea order
Ancyloceratidae
Ancyloceras
sp.