Hildoceras

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File:Hildoceras NT.jpg
Recreation of Hildoceras
File:Hildoceras-fajok a Gerecse hegységből.tif
Hildoceras species from the Toarcian Bifrons Zone of the Gerecse Mts, Hungary. Collection Eötvös University, Dep. Palaeontology, Budapest.

Hildoceras is a genus of ammonite from the Jurassic[1] period 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.

File:Hildoceras spp.jpg
Hildoceras sp morphological and external structural characteristics

Distribution

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

Species

  • Hildoceras ameuri Rulleau, Elmi & Thevenard, 2001Script error: No such module "Check for unknown parameters".
  • Hildoceras apertum Gabilly, 1976Script error: No such module "Check for unknown parameters".
  • Hildoceras bifrons (Bruguière, 1789)Script error: No such module "Check for unknown parameters".
  • Hildoceras caterinii Merla, 1932Script error: No such module "Check for unknown parameters".
  • Hildoceras crassum Mitzopoulos, 1930Script error: No such module "Check for unknown parameters".
  • Hildoceras lusitanicum Meister, 1913Script error: No such module "Check for unknown parameters".
  • Hildoceras semipolitum Buckman, 1902Script error: No such module "Check for unknown parameters".
  • Hildoceras snoussi Elmi, 1977Script error: No such module "Check for unknown parameters".
  • Hildoceras sublevisoni Fucini, 1919Script error: No such module "Check for unknown parameters".
  • Hildoceras tethysi Géczy, 1967Script error: No such module "Check for unknown parameters".

References

Notes

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  1. ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
  2. ↑ Script error: No such module "citation/CS1".
  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.

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Bibliography
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