- Cyrtoceras
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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 Ancestory 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. http://www.journalarchive.jst.go.jp/jnlpdf.php?cdjournal=pjab1977&cdvol=63&noissue=5&startpage=135.
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