Suborder:
|
Tornoceratina
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Superfamily:
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Karagandoceratoidea
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Family:
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Prodromitidae
|
Genus:
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Asidoceras
|
Species:
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nikolaevi+ |
Qualifier:
|
ss |
Author:
|
Ruzhencev 1975,p.38
|
Lower Boundary:
|
Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
|
Upper Boundary:
|
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
|