Suborder:
|
Prolecanitina
|
Superfamily:
|
Medlicottioidea
|
Family:
|
Darvasiceratidae
|
Genus:
|
Darvasiceras |
Qualifier:
|
ge |
Author:
|
Leonova 1990,p.107
|
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
UTX Kungurian/Leonardian base, 275.6 million years
|