Suborder:
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Goniatitina
|
Superfamily:
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Neoicoceratoidea
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Family:
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Paragastrioceratidae
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Subfamily:
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Pseudogastrioceratinae
|
Genus:
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Pseudogastrioceras
|
Species:
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sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
|
Anderssonoceras/Prototoceras base, 260.4 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|