Suborder:
|
Agoniatitina
|
Superfamily:
|
Mimoceratoidea
|
Family:
|
Mimoceratidae
|
Genus:
|
Gyroceratites
|
Species:
|
pallantianus |
Qualifier:
|
ss |
Author:
|
Montesinos & Tr. 1987,p.201
|
Lower Boundary:
|
LD3C--LD3D: Anetoceras Range Zone top, 405.5 million years
|
Upper Boundary:
|
Gyroceratites gracilis RZ base [13,80], 404 million years
|