Suborder:
|
Goniatitina
|
Superfamily:
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Thalassoceratoidea
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Family:
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Thalassoceratidae
|
Subfamily:
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Thalassoceratinae
|
Genus:
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Allothalassoceras
|
Species:
|
busterense |
Qualifier:
|
sn |
Author:
|
Tumanskaia 1949,p.83
|
Lower Boundary:
|
TAP lower--upper Bus-Ter beds, 269.3 million years
|
Upper Boundary:
|
TAP upper Bus--Ter beds top, 268 million years
|