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Gyaloceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Haplocerataceae
Family:
Oppeliidae
Formal Genus Name and Reference:
Gyaloceras WHITEHOUSE, 1927
Type Species:
G. smithi
Images
(Click to enlarge in a new window)
Fig. 338,5. -G. smithi, V.Apt., Queens!.; X0.75 (567-)
Synonyms
Geographic Distribution
Eng.-Nigeria-Queens
Age Range
Beginning Stage in Treatise Usage:
U.Apt.
Beginning International Stage:
Aptian
Fraction Up In Beginning Stage:
66
Beginning Date:
115.99
Ending Stage in Treatise Usage:
U.Alb.
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Less involuIe Ihan Aeoneceras; later whorls at least more inflated, sides flat or convex; venter successively fastigate, subcarinate, and broadly rounded. Shell smooth.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Haplocerataceae
Family:
Oppeliidae
Formal Genus Name and Reference:
Gyaloceras WHITEHOUSE, 1927
Type Species:
G. smithi
Images
(Click to enlarge in a new window)
Fig. 338,5. -G. smithi, V.Apt., Queens!.; X0.75 (567-)
Synonyms
Geographic Distribution
Eng.-Nigeria-Queens
Age Range
Beginning Stage in Treatise Usage:
U.Apt.
Beginning International Stage:
Aptian
Fraction Up In Beginning Stage:
66
Beginning Date:
115.99
Ending Stage in Treatise Usage:
U.Alb.
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Less involuIe Ihan Aeoneceras; later whorls at least more inflated, sides flat or convex; venter successively fastigate, subcarinate, and broadly rounded. Shell smooth.