Lyelliceras Temporal range: Albian ~109.0–99.7  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Fossil of Lyelliceras lyelli from Peru
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	† Ammonoidea
Order:	† Ammonitida
Family:	† Lyelliceratidae
Genus:	† Lyelliceras Spath, 1921
Species
See text

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 (109.0 to 99.7 Ma). ^{[1] [2]}

Etymology

The genus has been named after geologist Charles Lyell.

Description

Shells of Lyelliceras species can reach a diameter of about 50 millimetres (2.0 in). They are moderately to very evolute. The section of the whorls is slightly compressed or circular, with straight radial ribs. ^{[3] [4]}

Species

The following species have been recognised: ^[1]

• Lyelliceras escragnollensis Kennedy, 2011
• Lyelliceras latili Kennedy and Klinger, 2008
• Lyelliceras lyelli (d'Orbigny, 1841)
• Lyelliceras pseudolyelli Parona and Bonarelli, 1897
• Lyelliceras vaasti Destombes et al., 1973

Distribution

Fossils of species within this genus have been found in the Cretaceous sediments of Colombia ( Hiló Formation, Tolima), France, Madagascar, Mexico, Peru, South Africa, United Kingdom, United States and Venezuela. ^[1]

References

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