Suborder:
|
Goniatitina
|
Superfamily:
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Shumarditoidea
|
Family:
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Shumarditidae
|
Genus:
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Shumardites
|
Species:
|
aktubensis aff. |
Qualifier:
|
af |
Author:
|
Bogoslovskaya et al. 1995.
|
Lower Boundary:
|
RUS Zhigulian--Orenburgian [Ruzhentsev], 305 million years
|
Upper Boundary:
|
Gzhelian--Asselian [C--P], 299 million years
|