Suborder:
|
Goniatitina
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Superfamily:
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Thalassoceratoidea
|
Family:
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Thalassoceratidae
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Subfamily:
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Thalassoceratinae
|
Genus:
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Aristoceratoides |
Qualifier:
|
ge |
Author:
|
Ruzhencev 1960,p.206
|
Lower Boundary:
|
Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
|
Upper Boundary:
|
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|