Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
|
Paragastrioceratidae |
Qualifier:
|
fa |
Author:
|
Ruzhencev 1951,p.138
|
Lower Boundary:
|
Asselian--Sakmarian [ASS--SAK], 294.6 million years
|
Upper Boundary:
|
Permian--Triassic (Induan base), 251 million years
|