“Ammonoceratites”的意思、由来-开放百科全书

词条

Ammonoceratites

释义

References

{{Italic title}}{{Taxobox
|image = Ammonoceratites ezoense - National Museum of Nature and Science, Tokyo - DSC06949.JPG
|image_caption = Ammonoceratites ezoense
|fossil_range = {{fossil range|Albian|ref=^[1]}}
|regnum = Animalia
|phylum = Mollusca
|classis = Cephalopoda
|subclassis = Ammonoidea
|genus = Ammonoceratites
|genus_authority = Bowditch 1822
|subdivision_ranks = Species ^[2]
|subdivision =

A. crenocostatus
A. lamarcki
Lytoceras (Ammonoceratites) betiokyense

}}{{commonscat|Ammonoceratites}}

Ammonoceratites is an extinct genus of ammonoid cephalopod known from the Albian (upper Lower Cretaceous) of British Columbia, Madagascar, New Zealand, and Japan, included in the Lytoceratidae.

The shell of Ammonoceratites is evolute, smooth, moderately expanded; the inner rim (dorsum) only slightly impressed; whorl section subcircular. It is similar to that of Lytoceras which has transverse ribbing and to that of Pictetia which is gyroconic (whorls not touching) and more strongly expanded.

References

1. ^{{cite web | last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database|authorlink =| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| accessdate = 2014-05-28 }}
2. ^Paleobiology Database - Ammonoceratites. 2014-05-29.

Arkell et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L; Geological Society of America and University of Kansas press.
C. W. Wright, J. H. Calloman, and M. K. Howarth. 1996. Cretaceous Ammonoidea. Treatise on Invertebrate Paleontology revised L(4):1-362

4 : Early Cretaceous ammonites|Extinct animals of Madagascar|Ammonitida genera|Lytoceratidae

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。