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Provalanginites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Olcostephanidae
Formal Genus Name and Reference:
Provalanginites FATMI , 1972, p. 351
Type Species:
*P. rhodesi; OD
Images
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Synonyms
Geographic Distribution
Pakistan
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (?Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
0
Beginning Date:
149.24
Ending Stage in Treatise Usage:
Upper Jurassic (?Tithonian)
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Excentrumbilicate sphaerocones agreeing in all respects with Valanginites KILIAN. [But recorded from more than one locality in the lowest of three members of the Chichale Formation of Pakistan. Provalanginites is found at least 15 meters below the top, in beds said to be Kimmeridgian to Upper Tithonian, and apparently associated with Proniceras and lying below Himalayites, and is succeeded, however, by the middle member, most of which is Upper Valanginian with abundant Olcostephanus but not, apparently, Valanginites. The genus has not been recorded from the Tithonian anywhere else, and there are no known plausible Tithonian relatives. The stratigraphic position needs reconfirmation].
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Perisphinctaceae
Family:
Olcostephanidae
Formal Genus Name and Reference:
Provalanginites FATMI , 1972, p. 351
Type Species:
*P. rhodesi; OD
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
Pakistan
Age Range
Beginning Stage in Treatise Usage:
Upper Jurassic (?Tithonian)
Beginning International Stage:
Tithonian
Fraction Up In Beginning Stage:
0
Beginning Date:
149.24
Ending Stage in Treatise Usage:
Upper Jurassic (?Tithonian)
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Excentrumbilicate sphaerocones agreeing in all respects with Valanginites KILIAN. [But recorded from more than one locality in the lowest of three members of the Chichale Formation of Pakistan. Provalanginites is found at least 15 meters below the top, in beds said to be Kimmeridgian to Upper Tithonian, and apparently associated with Proniceras and lying below Himalayites, and is succeeded, however, by the middle member, most of which is Upper Valanginian with abundant Olcostephanus but not, apparently, Valanginites. The genus has not been recorded from the Tithonian anywhere else, and there are no known plausible Tithonian relatives. The stratigraphic position needs reconfirmation].