Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Eogonioloboceratidae
|
Genus:
|
Arcanoceras?
|
Species:
|
declive |
Qualifier:
|
sn |
Author:
|
Wagner-Gentis 1971,p.655
|
Lower Boundary:
|
Pendleian--Arnsbergian [PND--ARN], 324 million years
|
Upper Boundary:
|
Arnsbergian--Chokierian [ARN--CHO], 319 million years
|