Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
|
Paragastrioceratidae
|
Subfamily:
|
Pseudogastrioceratinae
|
Genus:
|
Pseudogastrioceras
|
Species:
|
szechuanense |
Qualifier:
|
ss |
Author:
|
Chao & Liang 1965
|
Lower Boundary:
|
Paratirol./Shevyrev.--Pseudosteph./Tap., 253 million years
|
Upper Boundary:
|
Pseudosteph./Tap.--Pseudotir./Pleuron., 252.5 million years
|