Suborder:
|
Paraceltitina
|
Superfamily:
|
Xenodiscoidea
|
Family:
|
Pleuronodoceratidae
|
Genus:
|
Rotodiscoceras
|
Species:
|
hubeiense |
Qualifier:
|
ss |
Author:
|
Yang & Yang 1992,p.601
|
Lower Boundary:
|
Pseudotir./Pleuron.--Rotodiscoceras beds, 252 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|