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Colvillia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Desmocerataceae
Family:
Cleoniceratidae
Formal Genus Name and Reference:
Colvillia IMLAY, 1961, p. 57
Type Species:
C. kenti, OD
Images
(Click to enlarge in a new window)
Fig. 76, 2a, b. *C. kenti, X1 (Imlay, 1961).-Fig. 76, 2c. C. crassicostata Imlay, X1 (Imlay, 1961).
Synonyms
Geographic Distribution
Alaska
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Lower Albian)
Beginning International Stage:
Albian
Fraction Up In Beginning Stage:
0
Beginning Date:
113.2
Ending Stage in Treatise Usage:
Lower Cretaceous (Lower Albian)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
25
Ending Date:
110.03
Description
Moderately involute, compressed, with convex sides and narrowly arched venter, primary ribs long, thick, splitting about midflank into 2 or 3 secondaries that are projected on shoulders, constrictions present, strongest on venter
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Desmocerataceae
Family:
Cleoniceratidae
Formal Genus Name and Reference:
Colvillia IMLAY, 1961, p. 57
Type Species:
C. kenti, OD
Images
(Click to enlarge in a new window)
Fig. 76, 2a, b. *C. kenti, X1 (Imlay, 1961).-Fig. 76, 2c. C. crassicostata Imlay, X1 (Imlay, 1961).
Synonyms
Geographic Distribution
Alaska
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Lower Albian)
Beginning International Stage:
Albian
Fraction Up In Beginning Stage:
0
Beginning Date:
113.2
Ending Stage in Treatise Usage:
Lower Cretaceous (Lower Albian)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
25
Ending Date:
110.03
Description
Moderately involute, compressed, with convex sides and narrowly arched venter, primary ribs long, thick, splitting about midflank into 2 or 3 secondaries that are projected on shoulders, constrictions present, strongest on venter