Suborder:
|
Goniatitina
|
Superfamily:
|
Schistoceratoidea
|
Family:
|
Bendoceratidae |
Qualifier:
|
fy |
Author:
|
Plummer & Scott 1937,p.208
|
Valid:
|
Schistoceratidae Schmidt 1929,p.75 |
Lower Boundary:
|
U Halian--Bloydian, Brentwood base, 313 million years
|
Upper Boundary:
|
Gzhelian--Asselian [C--P], 299 million years
|