Suborder:
|
Goniatitina
|
Superfamily:
|
Thalassoceratoidea
|
Family:
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Thalassoceratidae
|
Subfamily:
|
Thalassoceratinae
|
Genus:
|
Thalassoceras |
Qualifier:
|
ge |
Author:
|
Gemmellaro 1887,p.69
|
Lower Boundary:
|
Asselian--Sakmarian [ASS--SAK], 294.6 million years
|
Upper Boundary:
|
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|