Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Dimorphoceratidae |
Qualifier:
|
fa |
Author:
|
Hyatt 1884,p.330
|
Lower Boundary:
|
DER Erdbacher Kalk base [05,40], 349.5 million years
|
Upper Boundary:
|
Arnsbergian--Chokierian [ARN--CHO], 319 million years
|