Английская Википедия:Acrioceras
Шаблон:Short description Шаблон:Automatic Taxobox
Acrioceras is an extinct genus of cephalopods belonging to the ammonite subclass.[1]
Description
A spire of one or two loosely coiled whorls followed by a short or long, straight or curved shaft, terminal hook, and short and or long final shaft. The ribs are generally fine and untuberculate, but sometimes the major ribs are enlarged and are carrying one to three tubercles. The ribs are single on the spire or the shaft but may branch from umbilical tubercles on the hook and the final shaft. The dorsum tends to become flat and the dorsolateral margin to become angular on the shaft and the hook.[1]
Distribution
Fossils of Acrioceras have been found in:[2]
- Barremian Formation, Brestak, Bulgaria
- Ono Formation, California
- Paja Formation, Colombia
- Barremian Provence, France
- Georgia
- Subway Formation, Germany
- Maiolica Formation, Italy
- Ishido and Inagoe Formations, Japan
- San Lucas Formation, Mexico
- Taboulouart Formation, Morocco
- Hauterivian Slovakia
- Makatini Formation, South Africa
- Hauterivian Murcia, Spain
References
External links
Шаблон:Taxonbar Шаблон:Ammonite-stub
- ↑ 1,0 1,1 Шаблон:Aut with Шаблон:Aut and Шаблон:Aut (1996), Mollusca 4 Revised , Cretaceous Ammonoidea, vol. 4, in Treatise on Invertebrate Paleontology, Part L (Roger L. Kaesler ed.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, pp. 223, 224.
- ↑ Шаблон:Cite web
- Английская Википедия
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- Ancyloceratina
- Ammonitida genera
- Barremian life
- Hauterivian life
- Ammonites of Africa
- Cretaceous Morocco
- Fossils of Morocco
- Ammonites of Asia
- Fossils of Japan
- Early Cretaceous ammonites of Europe
- Cretaceous France
- Fossils of France
- Cretaceous Germany
- Fossils of Germany
- Cretaceous Italy
- Fossils of Italy
- Fossils of Slovakia
- Cretaceous Spain
- Fossils of Spain
- Early Cretaceous ammonites of North America
- Cretaceous California
- Fossils of the United States
- Cretaceous Mexico
- Fossils of Mexico
- Ammonites of South America
- Cretaceous Colombia
- Fossils of Colombia
- Paja Formation
- Fossil taxa described in 1900
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