Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Girtyoceratidae
|
Subfamily:
|
Girtyoceratinae
|
Genus:
|
Girtyoceras
|
Species:
|
sp.nov. |
Qualifier:
|
sy |
Author:
|
Lemosquet et al. 1985,p.418
|
Valid:
|
[not recognizable] |
Lower Boundary:
|
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
|
Upper Boundary:
|
Pendleian--Arnsbergian [PND--ARN], 324 million years
|