Suborder:
|
Otoceratina
|
Family:
|
Anderssonoceratidae
|
Subfamily:
|
Planodiscoceratinae |
Qualifier:
|
fs |
Author:
|
Zhao et al. 1978,p.81
|
Lower Boundary:
|
Anderssonoceras/Prototoceras base, 260.4 million years
|
Upper Boundary:
|
Anderssonoc./Prototoc.--Araxoc./Kongl., 258 million years
|