Suborder:
|
Goniatitina
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Superfamily:
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Gastrioceratoidea
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Family:
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Gastrioceratidae
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Genus:
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Gastrioceras
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Species:
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kenadsae |
Qualifier:
|
ss |
Author:
|
Delépine 1941,p.93
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Lower Boundary:
|
Duckmantian--Bolsovian, Westphal.B--C, 310.6 million years
|
Upper Boundary:
|
Bolsovian--Westphalian D,Westphal.C--D, 309.5 million years
|