Suborder:
|
Anarcestina
|
Superfamily:
|
Beloceratoidea
|
Family:
|
Beloceratidae
|
Genus:
|
Beloceras
|
Species:
|
ruani |
Qualifier:
|
sy |
Author:
|
Yatskov 1990,p.45
|
Valid:
|
Beloceras teunistriatum (Arch.& Vern.) [TAX1447 ] |
Lower Boundary:
|
DER do one beta base, 378.7 million years
|
Upper Boundary:
|
UD1L--UD2A:(frechi Zone base) [06,10], 374.5 million years
|