Suborder:
|
Goniatitina
|
Superfamily:
|
Schistoceratoidea
|
Family:
|
Orulganitidae
|
Genus:
|
Yakutoceras |
Qualifier:
|
ge |
Author:
|
Popov 1965,p.70
|
Lower Boundary:
|
RUS Branner./Gastr.--Diabol./Winslow. GZ, 311.7 million years
|
Upper Boundary:
|
Diabol./Winsl--Paralego./Eowellerites GZ, 309.5 million years
|