Suborder:
|
Goniatitina
|
Superfamily:
|
Schistoceratoidea
|
Family:
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Orulganitidae
|
Genus:
|
Yakutoceras
|
Species:
|
borealis |
Qualifier:
|
ss |
Author:
|
Andrianov 1985,p.27
|
Lower Boundary:
|
RUS Branner./Gastr.--Diabol./Winslow. GZ, 311.7 million years
|
Upper Boundary:
|
Diabol./Winsl--Paralego./Eowellerites GZ, 309.5 million years
|