Suborder:
|
Goniatitina
|
Superfamily:
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Goniatitoidea
|
Family:
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Agathiceratidae
|
Genus:
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Proshumardites
|
Species:
|
acutisellatus |
Qualifier:
|
ss |
Author:
|
Wang 1981,p.476
|
Lower Boundary:
|
RUS Nm2c1--Nm2c2 (V.vern.--B.superbil.), 314.2 million years
|
Upper Boundary:
|
RUS Nm2c2 top;Biling./Canc.--Bran./Gast., 313 million years
|