Suborder:
|
Goniatitina
|
Superfamily:
|
Cycloloboidea
|
Family:
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Vidrioceratidae
|
Genus:
|
Martoceras
|
Species:
|
krasnopolskyi |
Qualifier:
|
ss |
Author:
|
Karpinskii 1889,p.73
|
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|