Suborder:
|
Otoceratina
|
Family:
|
Araxoceratidae
|
Subfamily:
|
Araxoceratinae
|
Genus:
|
Prototoceras
|
Species:
|
sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
|
AZB base Araxoceras beds, 260.4 million years
|
Upper Boundary:
|
AZB Araxoceras--Vedioceras beds, 256 million years
|