Lyelliceras
Lyelliceras is a genus of ammonites belonging to the family Lyelliceratidae. These cephalopods were fast-moving nektonic carnivores. They lived in the Cretaceous period, Albian stage.
Etymology
The genus has been named after geologist Charles Lyell.Description
Shells of Lyelliceras species can reach a diameter of about. They are moderately to very evolute. The section of the whorls is slightly compressed or circular, with straight radial ribs.Species
The following species have been recognised:- Lyelliceras escragnollensis
- Lyelliceras latili
- Lyelliceras lyelli
- Lyelliceras pseudolyelli
- ''Lyelliceras vaasti''