Suborder:
|
Anarcestina
|
Superfamily:
|
Triainoceratoidea
|
Family:
|
Eobeloceratidae |
Qualifier:
|
fy |
Author:
|
Becker & House 1993,p.117
|
Valid:
|
Beloceratidae Hyatt TAX5414 |
Lower Boundary:
|
mid.--up.varcus Zone [17,00], 389 million years
|
Upper Boundary:
|
UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|