Skirroceras bayleanumSkirroceras bayleanum is a Stephanoceratacean species belonging to the family Stephanoceratidae.These fast-moving nektonic carnivores lived during the Jurassic period, in the Bajocian age.DescriptionSkirroceras bayleanum has a shell reaching about of diameter.DistributionFossils of Skirroceras bayleanum are found in the Middle Jurassic Bajocian age marine strata of United Kingdom and France.