Ochetoceras: Difference between revisions
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'''''Ochetoceras''''' is a genus of ammonites, belonging to the [[Oppeliidae]], that lived during the Late [[Jurassic]] from the early [[Oxfordian (stage)|Oxfordian]] to the early [[Tithonian]], and type for the subfamily [[Ochetoceratinae]]. |
'''''Ochetoceras''''' is a genus of ammonites, belonging to the [[Oppeliidae]], that lived during the Late [[Jurassic]] from the early [[Oxfordian (stage)|Oxfordian]] to the early [[Tithonian]], and type for the subfamily [[Ochetoceratinae]]. <ref name="paleodb">{{cite web | title= Paleobiology Database - Ochetoceras |authorlink =| coauthors = | year = | url = http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=15273&is_real_user=1| accessdate = 2017-10-19 }}</ref> |
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The shell of ''Ochetoceras'' is rather involute and strongly ribbed. The whorl section is compressed, higher than wide, and deeply impressed by the previous whorl. Flanks are broadly convex and converge to a narrowly rounded venter. Flanks are in two parts, inner and outer, separated by a lateral groove found also in ''[[Glochiceras]]'' and less pronounced in ''[[Hecticoceras|(Chanasia)]]''. Inner ribs slant strongly forward going radially outward and a fairly wide spaced. Outer ribs are fairly radial but curve slightly forward at the ventro-lateral shoulder; are more numerous and closer spaced. The narrow venter is smooth with a pronounced median keel. |
The shell of ''Ochetoceras'' is rather involute and strongly ribbed. The whorl section is compressed, higher than wide, and deeply impressed by the previous whorl. Flanks are broadly convex and converge to a narrowly rounded venter. Flanks are in two parts, inner and outer, separated by a lateral groove found also in ''[[Glochiceras]]'' and less pronounced in ''[[Hecticoceras|(Chanasia)]]''. Inner ribs slant strongly forward going radially outward and a fairly wide spaced. Outer ribs are fairly radial but curve slightly forward at the ventro-lateral shoulder; are more numerous and closer spaced. The narrow venter is smooth with a pronounced median keel. |
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Revision as of 19:31, 20 October 2017
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| Genus: | Ochetoceras Haug, 1855
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Ochetoceras is a genus of ammonites, belonging to the Oppeliidae, that lived during the Late Jurassic from the early Oxfordian to the early Tithonian, and type for the subfamily Ochetoceratinae. [2]
The shell of Ochetoceras is rather involute and strongly ribbed. The whorl section is compressed, higher than wide, and deeply impressed by the previous whorl. Flanks are broadly convex and converge to a narrowly rounded venter. Flanks are in two parts, inner and outer, separated by a lateral groove found also in Glochiceras and less pronounced in (Chanasia). Inner ribs slant strongly forward going radially outward and a fairly wide spaced. Outer ribs are fairly radial but curve slightly forward at the ventro-lateral shoulder; are more numerous and closer spaced. The narrow venter is smooth with a pronounced median keel.
Ochetoceras has been found in Europe, North Africa, Russia, Iran, Mexico, Cuba, and Chili. The type, O. canaloculatum (Buch) is from the Oxfordian of Germany'
References
- Notes
- ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2008-05-07. Retrieved 2017-10-18.
{{cite journal}}:|archive-date=/|archive-url=timestamp mismatch; 2016-02-25 suggested (help); Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ "Paleobiology Database - Ochetoceras". Retrieved 2017-10-19.
{{cite web}}: Cite has empty unknown parameter:|coauthors=(help)
- Bibliography
- W.J. Arkell, et al. 1957 Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press.
External Links
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