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
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
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
Middle Ordovician genus first appearances
Middle Devonian genus extinctions
Fossils of Georgia (U.S. state) Paleozoic life of Manitoba Paleozoic life of Nunavut
