Suborder:
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Goniatitina
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Superfamily:
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Thalassoceratoidea
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Family:
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Bisatoceratidae
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Genus:
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Bisatoceras
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Species:
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renni |
Qualifier:
|
ss |
Author:
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Nassichuk 1975,p.101
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Lower Boundary:
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U Halian--Bloydian, Brentwood base, 313 million years
|
Upper Boundary:
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Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
|