| Suborder: |
Goniatitina
|
| Superfamily: |
Cycloloboidea
|
| Family: |
Vidrioceratidae
|
| Genus: |
Martoceras
|
| Species: | krasnopolskyi forma a |
| Qualifier: | sy |
| Author: |
Maksimova 1935,p.281
|
| 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
|
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