| Orthaspidoceras Temporal range: Kimmeridgian PreꞒ Ꞓ O S D C P T J K Pg N | |
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| Fossil shell of Orthaspidoceras schilleri, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Ammonitida |
| Family: | Aspidoceratidae |
| Genus: | Orthaspidoceras Spath 1925 |
| Species | |
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Orthaspidoceras is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic period, Kimmeridgian age.
Description
Shells of Orthaspidoceras are medium or large-sized, with a diameter reaching about 20–25 centimetres (7.9–9.8 in). These shells are relatively involute and thick, with a quadrate-rounded or depressed whorls. The ornamentation consists of a row of coarse tubercles and fine streaks.
Distribution
Jurassic deposites of Italy, Mexico, Switzerland and Yemen.
References
- ^ Jean-ours.filippi
- Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda Archived 2016-02-25 at the Wayback Machine
- Paleobiology Database – Orthaspidoceras. 2014-05-29.
- Arkell, et al.,1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press. p. L338-339.
External links
| Taxon identifiers | |
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| Orthaspidoceras | |
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