Hildoceras Temporal range:
| |
---|---|
![]() | |
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 | |
|
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Hildoceras_NT.jpg/220px-Hildoceras_NT.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Hildoceras-fajok_a_Gerecse_hegys%C3%A9gb%C5%91l.tif/lossy-page1-220px-Hildoceras-fajok_a_Gerecse_hegys%C3%A9gb%C5%91l.tif.jpg)
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.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Hildoceras_spp.jpg/220px-Hildoceras_spp.jpg)
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, 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
- Notes
- ^ a b Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- ^ "Paleobiology Database - Hildoceras". Retrieved 17 December 2021.[permanent dead link]
- ^ 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.