Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
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Paragastrioceratidae
|
Subfamily:
|
Pseudogastrioceratinae |
Qualifier:
|
fs |
Author:
|
Ruzhencev 1966,p.278
|
Lower Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|