Suborder:
|
Goniatitina
|
Superfamily:
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Schistoceratoidea
|
Family:
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Welleritidae
|
Subfamily:
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Axinolobinae
|
Genus:
|
Axinolobus |
Qualifier:
|
ge |
Author:
|
Gordon 1960,p.149
|
Lower Boundary:
|
UAR Woolsey--Dye Shale, "caprock", 311.7 million years
|
Upper Boundary:
|
UOK Gene Autry top--Otterville, 310.8 million years
|