“Hildoceras”的意思、由来-开放百科全书

词条

Hildoceras

释义

Distribution
References

{{Italic title}}{{Automatic taxobox
|fossil_range = {{Fossil range|Toarcian|Aalenian|ref=^[1]}}
|image = Hildoceras spp.jpg
|image_caption = Hildoceras sp.
|taxon = Hildoceras
|authority = Hyatt, 1876
|subdivision_ranks = Species
|subdivision =

Hildoceras semipolitum
Hildoceras bifrons }}

Hildoceras is a genus of ammonite from the Jurassic^[1] era in the family Hildoceratidae. The shells are characterized by a narrow discoidal evolute shape, keeled venter, concave ribs along the outer flanks, and a shallow spiral groove running along smooth inner flanks. Whorls slightly overlap, cross sections are compressed. The ventral keel is bordered on either side by a shallow groove. The genus was named by Alpheus Hyatt after Saint Hilda in 1876.

Distribution

Jurassic of Bulgaria, France, Germany, Hungary, Italy, Japan, Luxembourg, Serbia and Montenegro, Spain, the United Kingdom and Iran.^[2]^[3]

References

Notes

1. ^¹{{cite web | last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database|authorlink =| coauthors =| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| accessdate = 2014-05-28 }}
2. ^{{cite web | title= Paleobiology Database - Hildoceras|authorlink =| coauthors =| year = | url = http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=14995 | accessdate = 2014-05-28 }}
3. ^Seyed-Emami, Kazem, et al. "Toarcian and Aalenian (Jurassic) ammonites from the Shemshak Formation of the Jajarm area (eastern Alborz, Iran)." Paläontologische Zeitschrift 79.3 (2005): 349-369.

Bibliography

{{cite book| first1=W.J. |last1=Arkell |first2=B. |last2=Kummel |first3=C.W. |last3=Wright |series=Treatise on Invertebrate Paleontology, Part L, Mollusca 4| title=Mesozoic Ammonoidea | publisher=Geological Society of America and University of Kansas Press |location=Lawrence, Kansas|year=1957}}

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