Cyrtoceras
| Cyrtoceras Temporal range: [dead link]
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| Genus: | Cyrtoceras
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Cyrtoceras is an extinct genus of oncoceridan nautiloids that lived from the middle Ordovician to the middle Devonian, in Africa, Europe, North America and South America.
References
- ^ Teiichi KOBAYASHI (1987). "The Ancestry of the Cephalopoda: From Helcionella to Plectronoceras". Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences. 63 (5): 135. doi:10.2183/pjab.63.135.[permanent dead link]
Sources
- Fossils (Smithsonian Handbooks) by David Ward
- Fossils (A Golden Guide from St. Martin's Press) by Frank H. T. Rhodes, Paul R. Shaffer, Herbert S. Zim, and Raymond Perlman
- Aquagenesis: The Origin and Evolution of Life in the Sea by Richard Ellis
External links
- Cyrtoceras in the Paleobiology Database
 | This prehistoric nautiloid-related article is a stub. You can help Wikipedia by expanding it. |
Categories:
- Prehistoric nautiloid genera
- Devonian cephalopods
- Ordovician cephalopods
- Paleozoic cephalopods of Africa
- Paleozoic cephalopods of Europe
- Paleozoic cephalopods of North America
- Paleozoic cephalopods of South America
- Silurian cephalopods
- Cambrian first appearances
- Middle Devonian genus extinctions
- Fossils of Georgia (U.S. state)
- Paleozoic life of Manitoba
- Paleozoic life of Nunavut
- Prehistoric nautiloid stubs