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Pseudotissotia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Pseudotissotiidae
Formal Genus Name and Reference:
Pseudotissotia PERON, 1897, p. 26
Type Species:
Ammonites galliennei Orbigny, 1850a, p. 190, SD PERVINQUIÈRE, 1907, p. 349
Images
(Click to enlarge in a new window)
Fig. 137, 2a, b. *P. galliennei (Orbigny), Middle Turonian, Tunisia, X0.5 (Peron, 1896-1897), Fig. 137, 2c, d. P. nigeriensis (Woods), Lower Turonian, Nigeria, ×0.75 (Woods, 1911)
Synonyms
Bauchioceras; ? Discovascoceras; Furoniceras
Geographic Distribution
France, Spain, northern and western Africa, Syria, Israel, Texas, Mexico, Central America, Colombia, Brazil
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Lower Turonian)
Beginning International Stage:
Turonian
Fraction Up In Beginning Stage:
0
Beginning Date:
93.9
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Turonian-Middle Turonian)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
75
Ending Date:
90.52
Description
Compressed to slightly depressed, whorl section more or less rectangular or trapezoidal, with flat venter, inner whorls with 2 or 3 fairly persistent keels, the ventrolateral ones clavate and the siphonal ones nodate in depressed, strongly ornamented individuals, and all keels entire in compressed, smooth individuals, sparse, broad ribs on inner whorls may persist, outer whorls tending to be rounded in section.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Acanthocerataceae
Family:
Pseudotissotiidae
Formal Genus Name and Reference:
Pseudotissotia PERON, 1897, p. 26
Type Species:
Ammonites galliennei Orbigny, 1850a, p. 190, SD PERVINQUIÈRE, 1907, p. 349
Images
(Click to enlarge in a new window)
Fig. 137, 2a, b. *P. galliennei (Orbigny), Middle Turonian, Tunisia, X0.5 (Peron, 1896-1897), Fig. 137, 2c, d. P. nigeriensis (Woods), Lower Turonian, Nigeria, ×0.75 (Woods, 1911)
Synonyms
Bauchioceras; ? Discovascoceras; Furoniceras
Geographic Distribution
France, Spain, northern and western Africa, Syria, Israel, Texas, Mexico, Central America, Colombia, Brazil
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Lower Turonian)
Beginning International Stage:
Turonian
Fraction Up In Beginning Stage:
0
Beginning Date:
93.9
Ending Stage in Treatise Usage:
Upper Cretaceous (Lower Turonian-Middle Turonian)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
75
Ending Date:
90.52
Description
Compressed to slightly depressed, whorl section more or less rectangular or trapezoidal, with flat venter, inner whorls with 2 or 3 fairly persistent keels, the ventrolateral ones clavate and the siphonal ones nodate in depressed, strongly ornamented individuals, and all keels entire in compressed, smooth individuals, sparse, broad ribs on inner whorls may persist, outer whorls tending to be rounded in section.