Berriasella privasensis, from here.

Belongs within: Neocomitidae.

Berriasella is a genus of ammonites known from the Upper Tithonian of the Upper Cretaceous to the Berriasian of the Lower Cretaceous (Wright et al. 1996).

Characters (from Wright et al. 1996): More or less compressed but generally with convex sides; ribbing distinct and sharp, biplicate or simple, not modifying until close to aperture; venter with narrow, smooth band or groove at least on early whorls.

<==Berriasella Uhlig 1905 (see below for synonymy)WCH96
    |  i. s.: B. akiyamaeK79
    |         B. euxinusWCH96
    |         B. grandisK79
    |         B. paramacilenta Mazenot 1939 [=*Hegaratella paramacilenta]WCH96
    |         B. picteti [=B. (Picteticeras) picteti]R81
    |         B. storri (Stanton 1895)SY85, WCH96 [=Hoplites storrsiWCH96, *Stenoceras storrsiWCH96]
    |         B. subeudichotomaP93
    |--B. (Berriasella) [incl. Parodontoceras Spath 1923]WCH96
    |    |--*B. (B.) privasensis (Pictet 1867) [=Ammonites privasensis]WCH96
    |    |--B. (B.) callistoR81
    |    `--B. (B.) callistoides (Behrendsen 1891) [=Hoplites callistoides, *Parodontoceras callistoides]WCH96
    `--B. (Elenaella Nikolov 1966) [incl. Delphinella Le Hégarat 1971]WCH96
         |--B. (*E.) cularensis Mazenot 1939WCH96
         `--‘Hoplites’ delphinensis Kilian 1889 [=*Delphinella delphinensis]WCH96

Berriasella Uhlig 1905 [incl. Hegaratella Nikolov & Sapunov 1977, Picteticeras Le Hégarat 1973 (n. n.), Stenoceras Uhlig 1911 non d’Orbigny 1849]WCH96

*Type species of generic name indicated


[K79] Kauffman, E. G. 1979. Cretaceous. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A418–A487. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[P93] Page, K. N. 1993. Mollusca: Cephalopoda (Ammonoidea: Phylloceratina, Lytoceratina, Ammonitina and Ancyloceratina). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 213–227. Chapman & Hall: London.

[R81] Rawson, P. F. 1981. Early Cretaceous ammonite biostratigraphy and biogeography. In: House, M. R., & J. R. Senior (eds) The Ammonoidea: The evolution, classification, mode of life and geological usefulness of a major fossil group pp. 499–529. Academic Press.

[SY85] Sha J.-G. & Yuan F.-S. 1985. Buchia fauna from Dong’anzhen Formation near Dong’an of Raohe County, Heilongjiang. Acta Palaeontologica Sinica 24 (6): 651–662.

[WCH96] Wright, C. W., J. H. Calloman & M. K. Howarth. 1996. Treatise on Invertebrate Paleontology pt L. Mollusca 4, revised vol. 4. Cretaceous Ammonoidea. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

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