Cyrtoceras
| Cyrtoceras Temporal range: Late Late Cambrian–Middle Devonian[1] | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Oncocerida |
| Genus: | Cyrtoceras |
Cyrtoceras is an extinct genus of oncoceridan nautiloid that lived from the middle Ordovician to the middle Devonian, in Africa, Europe, North America, and South America.
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
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.