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.

Cyrtoceras
Temporal range: Late 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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