Skirroceras bayleanum is a Stephanoceratacean (ammonite) species belonging to the family Stephanoceratidae. Skirroceras bayleanum at Bajocien14
These fast-moving nektonic carnivores lived during the Jurassic period, in the Bajocian age.Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda
Description Skirroceras bayleanum has a shell reaching about of diameter. Ammonites
Distribution Fossils of Skirroceras bayleanum are found in the Middle Jurassic Bajocian age marine strata of United Kingdom and France.
References
Geological Survey Professional Paper, Vol. 755-757
External links MNHN