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Trachyceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Clydonitaceae
Family:
Trachyceratidae
Formal Genus Name and Reference:
Trachyceras LAUBE, 1869
Type Species:
Ceratites aon MÜNSTER, 1834
Images
(Click to enlarge in a new window)
Fig. 190,5. *T. (T.) aon (Münster), Carn., Alps, 5a-c, x1 (293*).
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
M.Trias.(Anis.)
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
U.Trias.(Carn.)
Ending International Stage:
Carnian
Fraction Up In Ending Stage:
100
Ending Date:
227.3
Description
Moderately involute, compressed, venter rounded, with median furrow bordered by rows of tubercles, whorl sides with single and bifurcating ribs and spiral rows of tubercles. Suture ammonitic, not deeply serrated, with 2 lateral lobes
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Clydonitaceae
Family:
Trachyceratidae
Formal Genus Name and Reference:
Trachyceras LAUBE, 1869
Type Species:
Ceratites aon MÜNSTER, 1834
Images
(Click to enlarge in a new window)
Fig. 190,5. *T. (T.) aon (Münster), Carn., Alps, 5a-c, x1 (293*).
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
M.Trias.(Anis.)
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
U.Trias.(Carn.)
Ending International Stage:
Carnian
Fraction Up In Ending Stage:
100
Ending Date:
227.3
Description
Moderately involute, compressed, venter rounded, with median furrow bordered by rows of tubercles, whorl sides with single and bifurcating ribs and spiral rows of tubercles. Suture ammonitic, not deeply serrated, with 2 lateral lobes