Suborder:
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Tornoceratina
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Superfamily:
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Dimeroceratoidea
|
Family:
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Dimeroceratidae |
Qualifier:
|
fa |
Author:
|
Hyatt 1884,p.330
|
Lower Boundary:
|
UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|
Upper Boundary:
|
P.delph.--low.Platyclym.annulata IIIb/IV, 367.6 million years
|