Suborder:
|
Goniatitina
|
Superfamily:
|
Pericycloidea
|
Family:
|
Maxigoniatitidae
|
Genus:
|
Beyrichoceras
|
Species:
|
elabiodiense |
Qualifier:
|
ss |
Author:
|
Korn, Klug & Mapes 1999,p.349
|
Lower Boundary:
|
Bollandoc./Bollandit.--Beyrichoceras BZ, 334.5 million years
|
Upper Boundary:
|
DER Go alpha 2--Go alpha 3 [11.60], 332.3 million years
|