Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
|
Paragastrioceratidae
|
Subfamily:
|
Pseudogastrioceratinae
|
Genus:
|
Altudoceras |
Qualifier:
|
ge |
Author:
|
Ruzhencev 1940,p.286
|
Lower Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|
Upper Boundary:
|
AZB base Araxoceras beds, 260.4 million years
|