Echioceras

Echioceras is an extinct genus of ammonites from the Early Jurassic of Europe and North America.

Echioceras
Temporal range: Sinemurian,[1] 196.5–189.6 Ma [2]
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
Species
  • Echioceras delicatum Buckman, 1914
  • Echioceras intermedium Trueman and Williams, 1925
  • Echioceras raricostatum Zieten, 1831

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], Carpathians[3] and Alps.

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References
Notes
  1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2016-02-25. Retrieved 2017-10-18.
  2. Echioceras in Paleobiology Database
  3. Rakús, M., 1962: Amonity v liase Západných Karpát (Ammonites in Liassic of Western Carpathians). Geologické práce, Zošit 62, pp. 267 - 271
Bibliography
  • Cyril Walker & David Ward (1993) - Fossielen: Sesam Natuur Handboeken, Bosch & Keuning, Baarn. ISBN 90-246-4924-2


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