Berriasellidae
Encyclopedia
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.
Perisphinctaceae
Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic to Lower Cretaceous ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before crossing the venter....
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)
Treatise on Invertebrate Paleontology
The Treatise on Invertebrate Paleontology published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and...
, neocomitid genera are included in the Berriasellidae, sensu lato, as the Neocomitinae.
Berriasellinae includes the genera Andiceras
Andiceras
Andiceras is an enigmatic perisphinctacean ammonite belonging to the neocomitid subfamily Berriasellinae. Andiceras was named by Krantz in 1926 and is known from early Cretaceous, Berriasian, sediments in South America.-References:...
, Berriasella
Berriasella
Berriasella is a discoidal evolute perisphinctacean ammonite, and type genus for the neocomitid subfamily Berriasellinae. Its ribbing is distinct, consisting of both simple and bifurcated ribs that extend from the umbilical seam across the venter; its whorl section generally compressed, the venter...
, Blanfordiceras
Blanfordiceras
Blanfordiceras is a strongly ribbed, evolute ammonite included in the perisphinctacean family, Neocomitidae that lived during the latest Jurassic....
, Delphinella, Elenaella, Jabronella, Parandiceras, Raimondiceras, Subalpinites, Substeueroceras, and Tirnovella.