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Berriasella
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Neocomitidae
Formal Genus Name and Reference:
Berriasella UHLIG, 1905, p. 601
Type Species:
Berriasella broussi MAZENOT, 1939, p. 91, OD
Images
(Click to enlarge in a new window)
Fig. 37, 2a-c. *M. malbosi (Pictet), Berriasian, France, holotype, X0.5 (Mazenot, 1939)"
Synonyms
Retowskiceras, Chapericeras
Geographic Distribution
southern Europe, northern Africa, Madagascar
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (Upper Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
70
Beginning Date:
144.94
Ending Stage in Treatise Usage:
Lower Cretaceous (Upper Berriasian)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
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. GRIGORIEVA, 1938; LE HÉGARAT , 1973; MAZENOT , 1939; NIKOLOV , 1966a; UHLIG, 1903–1910.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Neocomitidae
Formal Genus Name and Reference:
Berriasella UHLIG, 1905, p. 601
Type Species:
Berriasella broussi MAZENOT, 1939, p. 91, OD
Images
(Click to enlarge in a new window)
Fig. 37, 2a-c. *M. malbosi (Pictet), Berriasian, France, holotype, X0.5 (Mazenot, 1939)"
Synonyms
Retowskiceras, Chapericeras
Geographic Distribution
southern Europe, northern Africa, Madagascar
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (Upper Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
70
Beginning Date:
144.94
Ending Stage in Treatise Usage:
Lower Cretaceous (Upper Berriasian)
Ending International Stage:
Berriasian
Fraction Up In Ending Stage:
100
Ending Date:
137.7
Description
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. GRIGORIEVA, 1938; LE HÉGARAT , 1973; MAZENOT , 1939; NIKOLOV , 1966a; UHLIG, 1903–1910.