Suborder:
|
Goniatitina
|
Superfamily:
|
Cycloloboidea
|
Family:
|
Vidrioceratidae
|
Genus:
|
Martoceras
|
Species:
|
krasnopolskyi forma þ |
Qualifier:
|
sy |
Author:
|
Voinova 1934,p.30
|
Valid:
|
Martoceras subinterruptum (Krotov 1885) |
Lower Boundary:
|
Aktastinian--Baigendzhinian [AKT--BAI], 282 million years
|
Upper Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|