Suborder:
|
Tornoceratina
|
Superfamily:
|
Prionoceratoidea
|
Family:
|
Prionoceratidae
|
Subfamily:
|
Prionoceratinae
|
Genus:
|
Irinoceras
|
Species:
|
weyeri |
Qualifier:
|
ss |
Author:
|
Work & Nassichuk 2000,p.33
|
Lower Boundary:
|
UAR Walls Ferry Fm. base, 356 million years
|
Upper Boundary:
|
UAR Walls Ferry Fm. top, 353 million years
|