United Kingdom and Ireland UK
Geological Time: Jurassic Upper Jurassic Tithonian
Kimmeridge Clay Formation
the raw material was collected and the specimen was extracted and photographed by
The identification is based upon:
, : Roemer, F.A. (1839). Die Versteinerungen des norddeutschen Oolithen-Gebirges. Ein Nachtrag. Hahn, Hannover, 59 pp. Plate , Fig.