{{Short description|Extinct genus of molluscs}} {{Automatic taxobox | fossil_range = Late Jurassic - Late Oligocene<br>~{{fossil range|155|23}} | image = Nautilaceae - Cymatoceras subalbensis.JPG | image_caption = ''Cymatoceras'' species from Albian of Madagascar | taxon = Cymatoceras | authority = Hyatt, 1884 | subdivision_ranks = Species | subdivision = See text }}
'''''Cymatoceras''''' is a wide-ranging extinct genus from the nautilitacean cephalopod family, Cymatoceratidae. They lived from the Late Jurassic to Late Oligocene, roughly from 155 to 23 Ma.<ref name=AA>[http://www.fossilworks.org/cgi-bin/bridge.pl?action=taxonInfo&is_real_user=1&taxon_no=13174 Fossilworks]</ref><ref>Sepkoski, Jack [http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class Sepkoski's Online Genus Database – Cephalopodes]</ref>
== Species == The following species of ''Cymatoceras'' have been described:<ref name=AA/> {{div col|colwidth=18em}} * ''C. albense'' * ''C. atlas'' * ''C. bayfieldi'' * ''C. bifidum'' * ''C. bifurcatum'' * ''C. carlottense'' * ''C. cenomanense'' * ''C. colombiana'' * ''C. crebricostatum'' * ''C. deslongchampsianum'' * ''C. eichwaldi'' * ''C. elegans'' * ''C. hendersoni'' * ''C. hilli'' * ''C. honmai'' * ''C. hunstantonensis'' * ''C. huxleyanum'' * ''C. karakaschi'' * ''C. kayeanum'' * ''C. kossmati'' * ''C. loricatum'' * ''C. ludevigi'' * ''C. manuanensis'' * ''C. mikado'' * ''C. neckerianum'' * ''C. negama'' * ''C. neocomiense'' * ''C. pacificum'' * ''C. paralibanoticum'' * ''C. patagonicum'' * ''C. patens'' * ''C. perstriatum'' * ''C. picteti'' * ''C. pseudoatlas'' * ''C. pseudoelegans'' * ''C. pseudoneokomiense'' * ''C. pseudonegama'' * ''C. pulchrum'' * ''C. radiatum'' * ''C. renngarteni'' * ''C. sakalavum'' * ''C. sarysuense'' * ''C. savelievi'' * ''C. semilobatum'' * ''C. sharpei'' * ''C. tenuicostatum'' * ''C. tourtiae'' * ''C. tskaltsithelense'' * ''C. tsukushiense'' * ''C. virgatum'' * ''C. yabei'' {{div col end}}
== Description == Its shell is generally subglobular, variably involute with a rounded whorl section. Sides and venter bear conspicuous ribs. The suture is only slightly sinuous and the siphuncle position is variable.<ref name=BB>Bernhard Kummel, 1964. Nautiloidea - Nautilida. Treatise on Invertebrate Paleontology Part K. Geol Soc of America and Univ Kans Press, Teichert & Moore (eds)</ref>
''Paracymatoceras'', coeval during the Late Jurassic and Early Cretaceous differs primarily in having a more sinuous suture. ''Neocymatoceras tsukushiense'' from the Oligocene Ashiya Group of Japan, described by Kobayashi, 1954, has been reassigned to ''Cymatoceras''.<ref name=BB/>
== Fossil record == Fossils of ''Cymatoceras'' are found in marine strata from the Jurassic until the Oligocene (age range: from 155.7 to 23 million years ago.). Fossils are known from several localities:<ref name=AA/>
;Jurassic Mexico
;Cretaceous Antarctica, Argentina, Armenia, Azerbaijan, Chile, Colombia (Payandé, Tolima and La Guajira), France, Georgia, Germany, Greenland, India, Italy, Japan, Kazakhstan, Madagascar, Mexico, Morocco, Mozambique, Papua New Guinea, Poland, the Russian Federation, Switzerland, Tanzania, Turkmenistan, Ukraine, the United Kingdom, United States (California, New Mexico, Texas).
;Oligocene Japan
== References == {{Portal|Paleontology}} {{Reflist}}
{{Taxonbar|from=Q5199382}}
Category:Prehistoric nautiloid genera Category:Late Jurassic genus first appearances Category:Oligocene genus extinctions Category:Mesozoic Antarctica Category:Cretaceous animals of Africa Category:Cretaceous animals of Asia Category:Cretaceous cephalopods of Europe Category:Jurassic cephalopods of North America Category:Jurassic Mexico Category:Cretaceous cephalopods of North America Category:Cretaceous Mexico Category:Cretaceous United States Category:Cretaceous animals of South America Category:Cretaceous Argentina Category:Cretaceous Chile Category:Cretaceous Colombia Category:Fossil taxa described in 1884