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Fontannesia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Sonniniidae
Formal Genus Name and Reference:
Fontannesia BUCKMAN, 1902
Type Species:
Dumortieria grammoceroides HAUG, 1887
Images
(Click to enlarge in a new window)
Fig. 312,3. *F. grammoceroides (Haug), Eng., 3a,b, x0.3 (595*)
Synonyms
Geographic Distribution
Eu.-W. Austral.-Can.-Arg.
Age Range
Beginning Stage in Treatise Usage:
M.Baj.(sowerbyi z.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
33
Beginning Date:
170
Ending Stage in Treatise Usage:
M.Baj.(sowerbyi z.)
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
66
Ending Date:
169.1
Description
Small to medium-sized planulates with tabulate to fastigate unicarinate venter, wide blunt keel, gradual and smooth umbilical slope, ribbing falcoid, no tubercles
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Sonniniidae
Formal Genus Name and Reference:
Fontannesia BUCKMAN, 1902
Type Species:
Dumortieria grammoceroides HAUG, 1887
Images
(Click to enlarge in a new window)
Fig. 312,3. *F. grammoceroides (Haug), Eng., 3a,b, x0.3 (595*)
Synonyms
Geographic Distribution
Eu.-W. Austral.-Can.-Arg.
Age Range
Beginning Stage in Treatise Usage:
M.Baj.(sowerbyi z.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
33
Beginning Date:
170
Ending Stage in Treatise Usage:
M.Baj.(sowerbyi z.)
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
66
Ending Date:
169.1
Description
Small to medium-sized planulates with tabulate to fastigate unicarinate venter, wide blunt keel, gradual and smooth umbilical slope, ribbing falcoid, no tubercles