Suborder:
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Tornoceratina
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Superfamily:
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Tornoceratoidea
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Family:
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Posttornoceratidae
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Genus:
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Exotornoceras
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Species:
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superstes+ |
Qualifier:
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ss |
Author:
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Wedekind 1908,p.575
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Lower Boundary:
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UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|
Upper Boundary:
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UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|