Suborder:
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Anarcestina
|
Superfamily:
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Triainoceratoidea
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Family:
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Petteroceratidae
|
Genus:
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Petteroceras
|
Species:
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sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
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FRM Pharc.arenicum--Pseudoprobel.pernai, 386.2 million years
|
Upper Boundary:
|
UD1A--UD1B: Koenenites base [ds96:00,30], 384.6 million years
|