Suborder:
|
Anarcestina
|
Superfamily:
|
Beloceratoidea
|
Family:
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Beloceratidae
|
Genus:
|
Mesobeloceras
|
Species:
|
acutum |
Qualifier:
|
ss |
Author:
|
Chao 1956,p.103
|
Lower Boundary:
|
UD1D--UD1E:S.syngon.--P.lutheri [02,00], 381.6 million years
|
Upper Boundary:
|
UD1L--UD2A:(frechi Zone base) [06,10], 374.5 million years
|