Hildoceras

Hildoceras; Temporal range: Toarcian PreꞒ Ꞓ O S D C P T J K Pg N
	Hildoceras sp.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Hildoceratidae
Subfamily:	†Hildoceratinae
Genus:	†Hildoceras; Hyatt, 1876
Species
	See text;

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.

Distribution[edit]

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

Species[edit]

Hildoceras ameuri Rulleau, Elmi & Thevenard, 2001
Hildoceras apertum Gabilly, 1976
Hildoceras bifrons (Bruguière, 1789)
Hildoceras caterinii Merla, 1932
Hildoceras crassum Mitzopoulos, 1930
Hildoceras lusitanicum Meister, 1913
Hildoceras semipolitum Buckman, 1902
Hildoceras snoussi Elmi, 1977
Hildoceras sublevisoni Fucini, 1919
Hildoceras tethysi Géczy, 1967

References[edit]

Notes

^ ^a ^b Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
^ "Paleobiology Database - Hildoceras". Retrieved 17 December 2021.
^ 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

Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.

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[Sepkoski_Ceph-1] Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.

[fossilworks-2] "Paleobiology Database - Hildoceras". Retrieved 17 December 2021.

[Seyed-EmamiEtAl-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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