Arnioceras

Arnioceras
Temporal range: Sinemurian[1]
Arnioceras acuticarinatu
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Superfamily:
Psiloceratoidea
Family:
Arietitidae
Genus:
Arnioceras

Hyatt, 1897
Species[2]
Synonyms
  • Arniotites
  • Burkhardticeras Lopez 1967
  • Eparnioceras Spath 1924
  • Laevispirus Venturi and Nannarone 2002
  • Melanhippites Crickmay 1928
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Arnioceras is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves.

Arnioceras, named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea, an ammonitid superfamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America.[2]

References

Notes
  1. ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2016-02-25. Retrieved 2017-10-18.
  2. ^ a b "Paleobiology Database - Arnioceras". Retrieved 2017-10-19.
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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