Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
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Family:
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Paragastrioceratidae
|
Subfamily:
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Paragastrioceratinae
|
Genus:
|
Paragastrioceras
|
Species:
|
ellipsoidale |
Qualifier:
|
ss |
Author:
|
Fredericks 1915,p.43
|
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|