TaxNo: 7123Subfamily Sverdrupitinae
| Suborder: |
Goniatitina
|
| Superfamily: |
Neoicoceratoidea
|
| Family: |
Spirolegoceratidae
|
| Subfamily: | Sverdrupitinae |
| Qualifier: | fy |
| Author: |
Leonova & Shilovskii 2007,p.33
|
| Valid: | Spirolegoceratinae Nassichuk (TAX 5258) |
| Lower Boundary: |
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|
| Upper Boundary: |
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|