Coroniceras

Coroniceras is a genus in the Arietitidae, a family in the ammonitid superfamily Psiloceratoidea, from the lower Sinermurian stage in the Lower Jurassic. It is a sub zone ammonite of the Arnioceras semicostatum Zone.

Coroniceras
Temporal range: Early Jurassic, Sinemurian[1]
Coroniceras rotiforme
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Superfamily:
Psiloceratoidea
Family:
Arietitidae
Subfamily:
Arietitinae
Genus:
Coroniceras

Arkell (1947)
Species [2]
  • C. bucklandi
  • C. charlesi
  • C. rotiforme
  • C. validanfractum
Synonyms
  • Arnioceratoides Spath, 1922
  • Epammonites Spath, 1922
  • Pararnioceras
  • Primarietites Buckman, 1926
  • Saccaiaceras Nannarone, 2002
  • Venturi Nannarone, 2002

Coroniceras has a thin discoidal form with a circular whorl section, arched venter, single tall keel, and few but strong ribs. Coroniceras is included in the subfamily Arietitinae.

Fossils of Coroniceras bucklandi are commonly found at Lyme Regis, Dorset Coast, England in the higher limestones of the Blue Lias.[3]

References
  1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1โ€“560. Archived from the original on 2008-05-07. Retrieved 2017-10-18.
  2. "Paleobiology Database - Coroniceras". Retrieved 2014-05-28.
  3. Davies, G. M. 1964. The Dorset Coast London: Adam and Charles Black.
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