Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Girtyoceratidae
|
Subfamily:
|
Girtyoceratinae
|
Genus:
|
Girtyoceras
|
Species:
|
bindemanni |
Qualifier:
|
sy |
Author:
|
Nicolaus 1963,p.124
|
Valid:
|
Cowdaleoceras araneum (Nicolaus 1963) |
Lower Boundary:
|
DER Go alpha 1--Go alpha 2 [11.00], 333 million years
|
Upper Boundary:
|
DER Go alpha 3--Go alpha 4 [13.00], 332 million years
|