Suborder:
|
Goniatitina
|
Superfamily:
|
Shumarditoidea
|
Family:
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Perrinitidae
|
Genus:
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Perrinites
|
Species:
|
hilli* |
Qualifier:
|
ss |
Author:
|
Smith 1903,p.140
|
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
Aktastinian--Baigendzhinian [AKT--BAI], 282 million years
|