Biology:Cymaceras
From HandWiki
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| Genus: | Cymaceras Quenstedt, 1887
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Cymaceras is a genus within the oppeliid subfamily Ochetoceratinae from the Kimmeridgian stage, around the middle of the Upper Jurassic.[2]
Cymaceras is rather unusual in its wavy keel that leans alternatingly to one side then the other. Shells are involute, compressed, with a narrow venter and distinct inner and outer ribs, both sets of which are curved in a concave forward fashion.
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 2016-02-25. https://web.archive.org/web/20160225225905/http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class. Retrieved 2017-10-18.
- ↑ "Paleobiology Database - Cymaceras". http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=14744&is_real_user=1. Retrieved 2017-10-19.
- Bibliography
W.J. Arkell, et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleongology, Part L. Geological Society of America and University of Kansas Press.
Wikidata ☰ Q18349684 entry
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