Suborder:
|
Goniatitina
|
Superfamily:
|
Cycloloboidea
|
Family:
|
Vidrioceratidae
|
Genus:
|
Stacheoceras |
Qualifier:
|
ge |
Author:
|
Gemmellaro 1887,p.26
|
Lower Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|