Cyrtoceras

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.

For the plant species also known as Cyrtoceras elegans, see Hoya celebica.

Cyrtoceras
Temporal range: Late Cambrian–Middle Devonian[1]
Digital life restoration of "Cyrtoceras sp"
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Oncocerida
Genus:
Cyrtoceras
Species
  • Cyrtoceras minneapolis (type)

References
  1. 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.

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


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