ammonite
Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...
s belonging to the family
Lyelliceratidae
Lyelliceratidae is a family of ammonites belonging to the superfamily Acanthoceratoidea
Acanthoceratoidea, formerly Acanthocerataceae, is a superfamily of Upper Cretaceous ammonoid cephalopods belonging to the order Ammonitida, and comprising ...
. These cephalopods were fast-moving nektonic carnivores. They lived in the Cretaceous period,
Albian
The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/s ...
Fossilworks
Fossilworks was a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world.
History
Fossilworks was cr ...
.org
Etymology
The genus has been named after geologist
Charles Lyell
Sir Charles Lyell, 1st Baronet, (14 November 1797 – 22 February 1875) was a Scottish geologist who demonstrated the power of known natural causes in explaining the earth's history. He is best known today for his association with Charles ...
.
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.Ammonites /ref>
Lyelliceras pseudolyelli
''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).Lyelliceras vaasti''
Distribution
Fossils of species within this genus have been found in the Cretaceous sediments of Colombia (
Hiló Formation
The Hiló Formation (, Kih) is a formation (geology), geological formation of the Altiplano Cundiboyacense, Cordillera Oriental (Colombia), Eastern Ranges of the Colombian Andes. The predominantly shale formation dates to the Middle Cretaceous per ...
, Tolima), France, Madagascar, Mexico, Peru, South Africa, United Kingdom, United States and Venezuela.