Arctocephalites
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{{Taxobox
|fossil_range = {{fossil range|Bathonian|ref={{cite web
| last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database|author-link =| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| access-date = 2014-05-28 }}}}
|regnum = Animalia
|phylum = Mollusca
|classis = Cephalopoda
|ordo = Ammonitida
|familia = Cardioceratidae
|genus = Arctocephalites
|genus_authority = Spath, 1928
|subdivision_ranks =
|subdivision =
}}
Arctocephalites is an extinct ammonitic cephalopod genus from the Middle Jurassic with a wide northern distribution belonging to the stephanoceratoidean family, Cardioceratidae.Arkell et at, 1957, Mesozoic Ammonoidea , Treatise on Invertebrate Paleontology, Part L, Mollusca 4, R.C. Moore, ed. p.L301
The inner whorls of the Arctocephalites shell are sharply ribbed but change abruptly to smooth. The such, as characteristic of the family, is complex with large first lateral lobe and well-developed umbilical lobe.
Arctocephalites has been found in Bathonian age sediments at Cook Inlet, Alaska, in western Montana, and in the North Sea at paleolatitudes ranging from about 30deg N to 50deg N.[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=14571 Paleobiology Database -Arctocephalites] 12/14/09 It has been found in equivalent age sediments in the Volga and Pechora river basin in Russia {{cite journal | url=https://doi.org/10.1134%2FS0869593809030058 | doi=10.1134/S0869593809030058 | title=Correlation of upper Bajocian-Bathonian zones in Siberia with the stage standard | date=2009 | last1=Meledina | first1=S. V. | last2=Nal’nyaeva | first2=T. I. | last3=Shurygin | first3=B. N. | journal=Stratigraphy and Geological Correlation | volume=17 | issue=3 | pages=291–297 | bibcode=2009SGC....17..291M | s2cid=129362860 | url-access=subscription }} as well as in Greenland, FanzJoseph Land, NovayZemlya, and eastern Siberia.
References
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Category:Jurassic ammonites of North America
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