Berniceras
Encyclopedia
Berniceras is an extinct ammonite genus from the order Ammonitida
that lived during the early Oxfordian stage of the Late Jurassic. Berniceras is included in the ammonite (sensu strictu) family, Oppeliidae.
Bernceras, which has been found in Europe, has a moderately enlarging, ribbed, involute shell with a keel along the venter, which forms the outer rim. The ribs are formed on the outer flanks and curve forward ventrally.
Ammonitida
The Ammonitida is an order of more highly evolved ammonoid cephalopods from the Jurassic and Cretaceous time periods, commonly with intricate ammonitic sutures....
that lived during the early Oxfordian stage of the Late Jurassic. Berniceras is included in the ammonite (sensu strictu) family, Oppeliidae.
Bernceras, which has been found in Europe, has a moderately enlarging, ribbed, involute shell with a keel along the venter, which forms the outer rim. The ribs are formed on the outer flanks and curve forward ventrally.
References
- Arkell et al,1957; Ammonitina in the Treatise on Invertebrate Paleontology, Part L, Ammonoidea; Geological Soc of America and Univ Kansas press.