TaxNo: 5455Propinacoceras modestum
| Suborder: |
Prolecanitina
|
| Superfamily: |
Medlicottioidea
|
| Family: |
Medlicottiidae
|
| Subfamily: |
Propinacoceratinae
|
| Genus: |
Propinacoceras
|
| Species: | modestum |
| Qualifier: | ss |
| Author: |
Leonova 1992,p.130
|
| Lower Boundary: |
Sygar Fm. base, 284.4 million years
|
| Upper Boundary: |
Chelamchin Fm. top, 270.6 million years
|