Suborder:
|
Goniatitina
|
Superfamily:
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Schistoceratoidea
|
Family:
|
Schistoceratidae
|
Genus:
|
Trigonogastrioceras |
Qualifier:
|
gy |
Author:
|
Librovitch 1957,p.256
|
Valid:
|
Diaboloceras Miller & Furnish 1940,p.527 |
Lower Boundary:
|
RUS Branner./Gastr.--Diabol./Winslow. GZ, 311.7 million years
|
Upper Boundary:
|
Diabol./Winsl--Paralego./Eowellerites GZ, 309.5 million years
|