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Hoplitoplacenticeras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Suborder:
Ammonitina
Superfamily:
Hoplitaceae
Family:
Placenticeratidae
Formal Genus Name and Reference:
Hoplitoplacenticeras PAULCKE, 1907, p. 183
Type Species:
Hoplites plasticus Paulcke, 1907, p. 186, ICZN Specific Name No. 1629
Images
(Click to enlarge in a new window)
FIG. 97,3a,b. *H. plasticus PAULCKE, Campanian, Patagonia; ×0.75 (Paulcke, 1907).
Synonyms
Dechenoceras
Geographic Distribution
France
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Upper Campanian)
Beginning International Stage:
Campanian
Fraction Up In Beginning Stage:
50
Beginning Date:
77.91
Ending Stage in Treatise Usage:
Upper Cretaceous (Upper Maastrichtian)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Rather evolute, whorl section compressed and parallel-sided to trapezoidal, venter flat, with prominent ribs varying from coarse and rounded to dense and fine, ribs nearly straight, with inner and outer ventrolateral tubercles, of which outer may be large and clavate, ribs crossing venter transversely and may have trace of siphonal tubercle
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Suborder:
Ammonitina
Superfamily:
Hoplitaceae
Family:
Placenticeratidae
Formal Genus Name and Reference:
Hoplitoplacenticeras PAULCKE, 1907, p. 183
Type Species:
Hoplites plasticus Paulcke, 1907, p. 186, ICZN Specific Name No. 1629
Images
(Click to enlarge in a new window)
FIG. 97,3a,b. *H. plasticus PAULCKE, Campanian, Patagonia; ×0.75 (Paulcke, 1907).
Synonyms
Dechenoceras
Geographic Distribution
France
Age Range
Beginning Stage in Treatise Usage:
Upper Cretaceous (Upper Campanian)
Beginning International Stage:
Campanian
Fraction Up In Beginning Stage:
50
Beginning Date:
77.91
Ending Stage in Treatise Usage:
Upper Cretaceous (Upper Maastrichtian)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Rather evolute, whorl section compressed and parallel-sided to trapezoidal, venter flat, with prominent ribs varying from coarse and rounded to dense and fine, ribs nearly straight, with inner and outer ventrolateral tubercles, of which outer may be large and clavate, ribs crossing venter transversely and may have trace of siphonal tubercle