Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
|
Eothinitidae |
Qualifier:
|
fy |
Author:
|
Ruzhencev 1956,p.193
|
Valid:
|
Metalegoceratidae (Eothinitinae) |
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
|