Suborder:
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Goniatitina
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Superfamily:
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Dimorphoceratoidea
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Family:
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Dimorphoceratidae
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Subfamily:
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Glyphiolobinae |
Qualifier:
|
fs |
Author:
|
Ruzhencev & Bog. 1969,p.61
|
Lower Boundary:
|
DER Go alpha 2--Go alpha 3 [11.60], 332.3 million years
|
Upper Boundary:
|
U Halian--Bloydian, Brentwood base, 313 million years
|