Cyrtoceras - Wikipedia
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 - mindat.org
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. From Wikipedia article at https://en.wikipedia.org/wiki/Cyrtoceras, which is released under the Creative Commons Attribution-Share-Alike License 3.0. Source Data.
2.1 Cephalopoda Stem Groups - Digital Atlas of Ancient Life
Overview. Crown-group Cephalopoda includes the shared common ancestor of Nautilus and all extant coleiods (squids, cuttlefish, and octopods), as well as all of the descendants of this common ancestor, which is thought to have lived during the …
Cyrtoceras Definition & Meaning - Merriam-Webster
The meaning of CYRTOCERAS is a genus of Paleozoic nautiloid cephalopods having a conical slightly curved shell with a large body chamber.
Cyrtoconic nautiloid cephalopods from the British Silurian
2007年1月1日 · Five species described from the order Oncocerida include two of Amphicyrloceras and one each of Cyrtorizoceras, Oonoceras and Bassettoceras, the last genus being new, as are the species Cyrtorizoceras yochelsoni and Amphicyrloceras rickardsi. Their …
Cyrtoceras - Prehistoric Flora Wiki
Cyrtoceras is a genus of nautiloid. Normally, the length of the shell is around 10 cm. Fossils have been discovered from the Cambrian to the Devonian, many of which were later re-listed as separate species. The characteristic of Cyrtoceras is the curved shell.
Cyrtoceras | Geology Collections
Cyrtoceras. Photographer: Ms. Dana A. Kahn : Field Museum of Natural History - Geology Department (c) Field Museum of Natural History - CC BY-NC 4.0 Description: 2018 Summer IMLS Ordovician digitization Project. Cephalopod label.
specimen doubtfully referred to Cyrtoceras may be an orthoconic shell, but with the exception of these three species all others are actinoceroids. No cyrtoceraconic, gyroceraconic or nautiliconic shells are known, unless the doubtful specimen already mentioned is a cyrtoceraconic form. No species of the Poterioceras, Gompho-
Cyrtoceras - Definition, Usage & Quiz | Ultimate Lexicon
Explore the term 'Cyrtoceras,' its etymology, and its role in paleontological studies. Learn about the characteristics of Cyrtoceras fossils, their historical importance, and related terminologies.
Walcott (1905) described Cyrtoceras cambria from the Upper Cambrian of China. This species later became the type of the genus Plectronoceras Ulrich and Foerste (1933). Kobayashi (1935) described a second species, P. liaotungense, in which he found in only one camera a connecting ring outlining an inflated
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