Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
|
Paragastrioceratidae
|
Subfamily:
|
Paragastrioceratinae
|
Genus:
|
Paragastrioceras
|
Species:
|
kojimense |
Qualifier:
|
sy |
Author:
|
Chernov 1939,p.173
|
Valid:
|
Paragastrioceras ellipsoidale (Fred.'15) |
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|