Lyelliceras

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Lyelliceras
Temporal range: Albian
~109.0–99.7 Ma
File:Lyelliceratidae - Lyelliceras lyelli.JPG
Fossil of Lyelliceras lyelli from Peru
Scientific classification Edit this classification
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

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The genus has been named after geologist Charles Lyell.

Description

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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

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The following species have been recognised:[1]

Distribution

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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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  1. ^ a b c Lyelliceras at Fossilworks.org
  2. ^ Sepkoski, Jack Sepkoski's Online Genus Database - Cephalopodes
  3. ^ Crioceratites
  4. ^ Ammonites

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