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Tissotia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Tissotiidae
Formal Genus Name and Reference:
Tissotia H. DOUVILLÉ, 1890, p. 285
Type Species:
Buchiceras tissoti BAYLE, 1878, pl. 40, fig. 1, OD
Images
(Click to enlarge in a new window)
FIG. 154,2a,b. *T. (T.) tissoti (B AYLE ), France; a, × 0.67; b, × 1 (Bayle, 1878).
Synonyms
Geographic Distribution
France, Spain, central Europe, northern and western Africa, Borneo
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Coniacian)
Beginning International Stage:
Coniacian
Fraction Up In Beginning Stage:
0
Beginning Date:
89.39
Ending Stage in Treatise Usage:
Upper Cretaceous (Coniacian)
Ending International Stage:
Coniacian
Fraction Up In Ending Stage:
100
Ending Date:
85.7
Description
Very involute, more or less inflated, early stages with low, branching ribs, siphonal keel, and ventrolateral keels or rows of tubercles, all of which may disappear. Suture with first lateral saddle divided into 2 equal saddles, one or both of which may have a few indentations, but these and other saddles usually entire.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Tissotiidae
Formal Genus Name and Reference:
Tissotia H. DOUVILLÉ, 1890, p. 285
Type Species:
Buchiceras tissoti BAYLE, 1878, pl. 40, fig. 1, OD
Images
(Click to enlarge in a new window)
FIG. 154,2a,b. *T. (T.) tissoti (B AYLE ), France; a, × 0.67; b, × 1 (Bayle, 1878).
Synonyms
Geographic Distribution
France, Spain, central Europe, northern and western Africa, Borneo
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Coniacian)
Beginning International Stage:
Coniacian
Fraction Up In Beginning Stage:
0
Beginning Date:
89.39
Ending Stage in Treatise Usage:
Upper Cretaceous (Coniacian)
Ending International Stage:
Coniacian
Fraction Up In Ending Stage:
100
Ending Date:
85.7
Description
Very involute, more or less inflated, early stages with low, branching ribs, siphonal keel, and ventrolateral keels or rows of tubercles, all of which may disappear. Suture with first lateral saddle divided into 2 equal saddles, one or both of which may have a few indentations, but these and other saddles usually entire.