Suborder:
|
Tornoceratina
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Superfamily:
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Praeglyphioceratoidea
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Family:
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Sporadoceratidae
|
Genus:
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Umbosporadoceras
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Species:
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krusati |
Qualifier:
|
ss |
Author:
|
Becker 2002,p.182
|
Lower Boundary:
|
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|
Upper Boundary:
|
UD2G--UD2H:subvaric.-P.contiguum [12,60], 370.4 million years
|