Balticeras

Balticeras is an involute, discoidal Upper Jurassic (Oxfordian) ammonite[1] (order Ammonitida) found in England, Germany, and Switzerland, belonging to the Perisphinctidae. The shell is strongly embracing, tending to be oxyconic (sharp rimmed). Sides are gently curved, converging on a narrow to sharp ventral rim.

Balticeras
Temporal range: Oxfordian[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Family:
Perisphinctidae
Genus:
Balticeras

Dohm, 1925
Species[2]

None cataloged

Balticeras is considered by some to be a subgenus of Ringsteadia which in contrast is more evolute, with ribbed inner whorls. Both are included in the Pictoniinae, a subfamily established by Spath, 1924, for large ammonites within the Perisphinctidae, tending to develop smooth middle and outer whorls.

References
Notes
  1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. "Paleobiology Database - 'Balticeras". Retrieved 2014-05-28.
Bibliography
  • Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol. Soc. of America and Univ. Kansas Press.


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