Suborder:
|
Goniatitina
|
Superfamily:
|
Pericycloidea
|
Family:
|
Muensteroceratidae
|
Genus:
|
Beyrichoceratoides
|
Species:
|
truncatum var.N |
Qualifier:
|
sy |
Author:
|
Currie 1954,p.555
|
Valid:
|
Eoglyphioceras truncatum (Phillips 1836) |
Lower Boundary:
|
DER Go alpha 2--Go alpha 3 [11.60], 332.3 million years
|
Upper Boundary:
|
DER Go alpha 3--Go alpha 4 [13.00], 332 million years
|