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Blanfordiceras
Classification
Phylum:
Unknown
Class:
Unknown
Order:
Unknown
Superfamily:
Perisphinctaceae
Family:
Olcostephanidae
Formal Genus Name and Reference:
Blanfordiceras COSSMANN, 1907, p. 64
Type Species:
Ammonites wallichi GRAY, 1832, pl. 100, fig. 3
Images
(Click to enlarge in a new window)
Fig. 38, 1a, b. *B. wallichi (Gray), India (Spiti Valley), holotype, BMNH C.5041, X0.7 (new).
Synonyms
Blanfordiceras, Pseudoblanfordia
Geographic Distribution
Pakistan, Himalayas, Indonesia, New Guinea, California, Argentina
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:
Upper Jurassic (Upper Tithonian)
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Like Berriasella but inflation greater, ribs more projected on shoulders and minutely tuberculate on either side of stronger and more persistent ventral groove; ribs becoming stronger and more widely spaced on body chamber.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Unknown
Order:
Unknown
Superfamily:
Perisphinctaceae
Family:
Olcostephanidae
Formal Genus Name and Reference:
Blanfordiceras COSSMANN, 1907, p. 64
Type Species:
Ammonites wallichi GRAY, 1832, pl. 100, fig. 3
Images
(Click to enlarge in a new window)
Fig. 38, 1a, b. *B. wallichi (Gray), India (Spiti Valley), holotype, BMNH C.5041, X0.7 (new).
Synonyms
Blanfordiceras, Pseudoblanfordia
Geographic Distribution
Pakistan, Himalayas, Indonesia, New Guinea, California, Argentina
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:
Upper Jurassic (Upper Tithonian)
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Like Berriasella but inflation greater, ribs more projected on shoulders and minutely tuberculate on either side of stronger and more persistent ventral groove; ribs becoming stronger and more widely spaced on body chamber.