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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Eumorphoceras
|
Species:
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varicatum |
Qualifier:
|
ss |
Author:
|
Schmidt 1934,p.449
|
Lower Boundary:
|
DER E2a--E2b, 322.5 million years
|
Upper Boundary:
|
DER E2b--E2c(Cravenocerat.--Nuculoceras), 321 million years
|