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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Cousteauceras
|
Species:
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costatum+ |
Qualifier:
|
ss |
Author:
|
Ruprecht 1937,p.271
|
Lower Boundary:
|
DER liethensis--chalicum, 327.6 million years
|
Upper Boundary:
|
DER chalic.--up.Go gamma2,Emstit.novalis, 327.2 million years
|