Suborder:
|
Goniatitina
|
Superfamily:
|
Popanoceratoidea
|
Family:
|
Popanoceratidae |
Qualifier:
|
fa |
Author:
|
Hyatt 1900,p.564
|
Lower Boundary:
|
Gzhelian--Asselian [C--P], 299 million years
|
Upper Boundary:
|
Wuchiapingian--Changhsingian [DZH--CHX], 253.8 million years
|