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:
, : d'Orbigny, A. (1826). Tableau méthodique de la classe des céphalopodes. Annales des Sciences Naturelles (1) 7: 96–169. Plate , Fig.