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Leconteites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Desmocerataceae
Family:
Cleoniceratidae
Formal Genus Name and Reference:
Leconteites CASEY, 1954a, p. 110
Type Species:
Desmoceras lecontei ANDERSON, 1902, p. 95, OD
Images
(Click to enlarge in a new window)
Fig. 74, 1a-c. *L. lecontei (Anderson), California, a, b, X, c,3.5 (Jones, Murphy, & Packard, 1965).-Fig. 74, 1d, e. L. sacramenticus (Anderson), California, X0.5 (Anderson, 1938).
Synonyms
Puzosigella, Vnigriceras, V. (Astrodiscus)
Geographic Distribution
Alaska, British Columbia, Oregon, California
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Lower Albian, tardefurcata Zone)
Beginning International Stage:
Albian
Fraction Up In Beginning Stage:
0
Beginning Date:
113.2
Ending Stage in Treatise Usage:
Lower Cretaceous (Lower Albian, tardefurcata Zone)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
25
Ending Date:
110.03
Description
Small to medium-sized, variable, and compressed to rather inflated, umbilicus from 17 to 30 percent of diameter, umbilical shoulder sharply rounded to angular, primary ribs sinuous, arising singly on umbilical wall or in twos or threes from umbilical bullae, projected towards venter, weakening or disappearing at venter, secondaries branching or intercalated at midflank, constrictions, if present, with or without collars. Suture finely or coarsely frilled.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Desmocerataceae
Family:
Cleoniceratidae
Formal Genus Name and Reference:
Leconteites CASEY, 1954a, p. 110
Type Species:
Desmoceras lecontei ANDERSON, 1902, p. 95, OD
Images
(Click to enlarge in a new window)
Fig. 74, 1a-c. *L. lecontei (Anderson), California, a, b, X, c,3.5 (Jones, Murphy, & Packard, 1965).-Fig. 74, 1d, e. L. sacramenticus (Anderson), California, X0.5 (Anderson, 1938).
Synonyms
Puzosigella, Vnigriceras, V. (Astrodiscus)
Geographic Distribution
Alaska, British Columbia, Oregon, California
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Lower Albian, tardefurcata Zone)
Beginning International Stage:
Albian
Fraction Up In Beginning Stage:
0
Beginning Date:
113.2
Ending Stage in Treatise Usage:
Lower Cretaceous (Lower Albian, tardefurcata Zone)
Ending International Stage:
Albian
Fraction Up In Ending Stage:
25
Ending Date:
110.03
Description
Small to medium-sized, variable, and compressed to rather inflated, umbilicus from 17 to 30 percent of diameter, umbilical shoulder sharply rounded to angular, primary ribs sinuous, arising singly on umbilical wall or in twos or threes from umbilical bullae, projected towards venter, weakening or disappearing at venter, secondaries branching or intercalated at midflank, constrictions, if present, with or without collars. Suture finely or coarsely frilled.