Suborder:
|
Prolecanitina
|
Superfamily:
|
Medlicottioidea
|
Family:
|
Darvasiceratidae |
Qualifier:
|
fy |
Author:
|
Leonova 1990,p.104
|
Valid:
|
Propinacoceratinae Plummer & Scott,1937 [TAX5925] |
Lower Boundary:
|
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
Upper Boundary:
|
UTX Kungurian/Leonardian base, 275.6 million years
|