Berriasellinae
Berriasellinae Temporal range: Tithonian–Berriasian | |
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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 | |
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Synonyms | |
Berriasellidae |
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.
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. Treasise 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