TaxNo: 4420Propinacoceras americanum
| Suborder: |
Prolecanitina
|
| Superfamily: |
Medlicottioidea
|
| Family: |
Medlicottiidae
|
| Subfamily: |
Propinacoceratinae
|
| Genus: |
Propinacoceras
|
| Species: | americanum |
| Qualifier: | sy |
| Author: |
Miller & Warren 1933,p.297
|
| Valid: | Propinacoceras beyrichi Gemmellaro 1887 |
| Lower Boundary: |
Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
|
| Upper Boundary: |
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|