Echioceras
| Echioceras Temporal range: Sinemurian, [1] 196.5– 189.6 Ma | |
|---|---|
 | |
| Fossil shells of Echioceras raricostatum from Pierreclos (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Family: | Echioceratidae |
| Genus: | Echioceras Bayle, 1878 |
Echioceras is an extinct genus of ammonite from the Early Jurassic of Europe and North America.
Selected species
- Echioceras raricostatum
- Echioceras fastigiatum
Echioceras ammonite
Description
Shell of Echioceras species can reach a diameter of about 4–6 centimetres (1.6–2.4 in).. The narrow and broad evolute shell is reinforced by fine ribs on inner whorls, progressively becoming stronger, straight and distinct.
Distribution
Fossils of species within this genus have been found in the Jurassic rocks of Canada, Hong Kong, Turkey and United Kingdom. [2]
References
- ↑ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- 1 2 Echioceras in Paleobiology Database
- Cyril Walker & David Ward (1993) - Fossielen: Sesam Natuur Handboeken, Bosch & Keuning, Baarn. ISBN 90-246-4924-2
External links
This article is issued from Wikipedia - version of the 10/10/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.