Suborder:
|
Goniatitina
|
Superfamily:
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Dimorphoceratoidea
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Family:
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Girtyoceratidae
|
Subfamily:
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Girtyoceratinae
|
Genus:
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Sulcogirtyoceras
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Species:
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sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
|
DER Go spirale--Go beta rotundum, 328.6 million years
|
Upper Boundary:
|
DER rotundum--Go beta suerlandense, 328.4 million years
|