TaxNo: 887Prionoceras yakowlewi
| Suborder: |
Tornoceratina
|
| Superfamily: |
Prionoceratoidea
|
| Family: |
Prionoceratidae
|
| Subfamily: |
Prionoceratinae
|
| Genus: |
Prionoceras
|
| Species: | yakowlewi |
| Qualifier: | sy |
| Author: |
Wedekind 1913,p.87
|
| Valid: |
Prionoceras divisum (Münster 1832) [TAX863] |
| Lower Boundary: |
P.delph.--low.Platyclym.annulata IIIb/IV, 367.6 million years
|
| Upper Boundary: |
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|