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Jamesonites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Polymorphitidae
Formal Genus Name and Reference:
Jamesonites BUCKMAN, 1923
Type Species:
*/. reticulatus
Images
(Click to enlarge in a new window)
Fig. 275,5. *U. (J.) reticulata (Buck.), x0.2 (65*)
Synonyms
Geographic Distribution
Eng.
Age Range
Beginning Stage in Treatise Usage:
L. Pliensb.(jamesoni z.)
Beginning International Stage:
Pliensbachian
Fraction Up In Beginning Stage:
0
Beginning Date:
192.9
Ending Stage in Treatise Usage:
L. Pliensb.(jamesoni z.)
Ending International Stage:
Pliensbachian
Fraction Up In Ending Stage:
50
Ending Date:
188.55
Description
Giant, compressed, more feebly ribbed than Uptonia, feebly tuberculate, outer whorl almost or quite smooth. Sutures complex. Subgen. of Uptonia.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Polymorphitidae
Formal Genus Name and Reference:
Jamesonites BUCKMAN, 1923
Type Species:
*/. reticulatus
Images
(Click to enlarge in a new window)
Fig. 275,5. *U. (J.) reticulata (Buck.), x0.2 (65*)
Synonyms
Geographic Distribution
Eng.
Age Range
Beginning Stage in Treatise Usage:
L. Pliensb.(jamesoni z.)
Beginning International Stage:
Pliensbachian
Fraction Up In Beginning Stage:
0
Beginning Date:
192.9
Ending Stage in Treatise Usage:
L. Pliensb.(jamesoni z.)
Ending International Stage:
Pliensbachian
Fraction Up In Ending Stage:
50
Ending Date:
188.55
Description
Giant, compressed, more feebly ribbed than Uptonia, feebly tuberculate, outer whorl almost or quite smooth. Sutures complex. Subgen. of Uptonia.