Suborder:
|
Goniatitina
|
Superfamily:
|
Gastrioceratoidea
|
Family:
|
Glaphyritidae
|
Subfamily:
|
Glaphyritinae
|
Genus:
|
Syngastrioceras
|
Species:
|
discoidale |
Qualifier:
|
ss |
Author:
|
Ruan 1981,p.192
|
Lower Boundary:
|
CNG Qixu 15 base, 315.4 million years
|
Upper Boundary:
|
CNG Qixu 16 top, 309.5 million years
|