Suborder:
|
Goniatitina
|
Superfamily:
|
Shumarditoidea
|
Family:
|
Perrinitidae
|
Genus:
|
Properrinites
|
Species:
|
furnishi |
Qualifier:
|
ss |
Author:
|
Nassichuk 1971,p.1009
|
Lower Boundary:
|
Asselian--Sakmarian [ASS--SAK], 294.6 million years
|
Upper Boundary:
|
Tastubian--Sterlitamakian [TAS--STE], 290 million years
|