Suborder:
|
Goniatitina
|
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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kutejnikovense |
Qualifier:
|
ss |
Author:
|
Popov 1979,p.84
|
Lower Boundary:
|
U Halian--Bloydian, Brentwood base, 313 million years
|
Upper Boundary:
|
Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
|