Suborder:
|
Goniatitina
|
Superfamily:
|
Schistoceratoidea
|
Family:
|
Schistoceratidae
|
Genus:
|
Paraschistoceras |
Qualifier:
|
ge |
Author:
|
Plummer & Scott 1937,p.248
|
Lower Boundary:
|
UTX Mineral Wells Fm. base, 306.8 million years
|
Upper Boundary:
|
Gzhelian--Asselian [C--P], 299 million years
|