Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Anthracoceratidae |
Qualifier:
|
fa |
Author:
|
Plummer & Scott 1937,p.321
|
Lower Boundary:
|
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
|
Upper Boundary:
|
Bolsovian--Westphalian D,Westphal.C--D, 309.5 million years
|