| 词条 | Cranocephalites |
| 释义 |
|name = Cranocephalites |fossil_range = {{fossil range|Bajocian|Bathonian|ref=[1]}} |regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |superfamilia = Stephanoceratoidea |familia = Cardioceratidae |genus = Cranocephalites }} Cranocephalites is a Middle Jurassic[1] ammonitid genus named by Spath in 1932 and included in the family Cranoceratidae, superfamily Stephanoceratacea. Cranocephalites, sometimes considered a subgenus of Arctocephalites which has sharply ribbed inner whorls and a smooth outer whorl, has a constricted eccentric body chamber. It is found in middle Jurassic sediments in Alaska, Greenland, Novaya-Zemlya, and eastern Siberia. References1. ^1 {{cite journal|last=Sepkoski |first=Jack |title=A compendium of fossil marine animal genera (Cephalopoda entry) | journal=Bulletins of American Paleontology |volume=363 |pages=1–560 | year=2002 | url=http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=231&rank=class |accessdate=2017-10-18 |deadurl=yes | archiveurl=https://web.archive.org/web/20080507014300/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=231&rank=class | archivedate=2008-05-07 |df= }}
2 : Jurassic ammonites|Fossils of Greenland |
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