Suborder:
|
Goniatitina
|
Superfamily:
|
Goniatitoidea
|
Family:
|
Agathiceratidae |
Qualifier:
|
fa |
Author:
|
Arthaber 1911,p.178
|
Lower Boundary:
|
DER Go beta--gamma, granos.base [P1--P2], 328.2 million years
|
Upper Boundary:
|
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|