Hildoceras

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.

Hildoceras sp morphological and external structural characteristics

Hildoceras
Temporal range: Toarcian–Aalenian[1]
Hildoceras sp.
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Hildoceratidae
Subfamily: †Hildoceratinae
Genus: †Hildoceras
Hyatt, 1876
Species
Recreation of Hildoceras

Distribution

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

References
Notes
  1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. "Paleobiology Database - Hildoceras". Retrieved 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
  • 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.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.