Suborder:
|
Tornoceratina
|
Superfamily:
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Tornoceratoidea
|
Family:
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Tornoceratidae
|
Subfamily:
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Tornoceratinae
|
Genus:
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Oxytornoceras
|
Species:
|
sp.* |
Qualifier:
|
of |
Author:
|
Petersen 1975,p.18
|
Lower Boundary:
|
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|
Upper Boundary:
|
UD2H--UD2I:(mamilliferum base) [12,90], 370 million years
|