Suborder:
|
Goniatitina
|
Superfamily:
|
Neoglyphioceratoidea
|
Family:
|
Cravenoceratidae
|
Subfamily:
|
Cravenoceratinae
|
Genus:
|
Lyrogoniatites
|
Species:
|
liethensis |
Qualifier:
|
ss |
Author:
|
Korn 1988,p.152
|
Lower Boundary:
|
DER Go gamma 1-2,liethens.base,P2c base, 327.8 million years
|
Upper Boundary:
|
DER liethensis--chalicum, 327.6 million years
|