Berriasellinae

Berriasellinae is a subfamily of very late Jurassic and very early Cretaceous perisphinctoid ammonites in the family Neocomitidae. Berriasellinae comprises generally compressed, evolute genera, typically with furcated ribbing, and in some a smooth ventral band or groove. Berriasellinae are derived from the Ataxioceratidae and gave rise to the other Neocomitidae. The short lived Himalayitidae from the uppermost Jurassic have a similar appearance but differ in being generally broader and having sharper ribbing.

Berriasellinae Temporal range: Tithonian–Berriasian PreꞒ Ꞓ O S D C P T J K Pg N
Fossil shell of Berriasella jabronensis from Gard (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Neocomitidae
Subfamily:	†Berriasellinae Spath, 1922
Genera
See text
Synonyms
Berriasellidae

In current classifications (e.g. Donovan et al. 1981) berriasellid perisphinctaceans are included in the Neocomitidae as a subfamily, the Berriasellinae. In older classification such as the Treatise on Invertebrate Paleontology, part L (1957), neocomitid genera are included in the Berriasellidae, sensu lato, as the Neocomitinae.

Berriasellinae includes the genera Andiceras, Berriasella, Blanfordiceras, Delphinella, Elenaella, Jabronella, Parandiceras, Raimondiceras, Subalpinites, Substeueroceras, and Tirnovella.

References

• Arkell, et al., 1957 Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. Geological Society of Americia and University of Kansas press.
• Donovan, Callomon and Howarth 1981. Classification of the Jurassic Ammonitina; Systematics Association.
• Paleobiology Database Berriasellinae entry accessed 11/26/10