Suborder:
|
Goniatitina
|
Superfamily:
|
Pericycloidea
|
Family:
|
Maxigoniatitidae
|
Subfamily:
|
Dzhaprakoceratinae
|
Genus:
|
Dzhaprakoceras?
|
Species:
|
arkansanum |
Qualifier:
|
ss |
Author:
|
Gordon 1965,p.177
|
Lower Boundary:
|
UAR Walls Ferry Fm. base, 356 million years
|
Upper Boundary:
|
UAR Walls Ferry Fm. top, 353 million years
|