Suborder:
|
Goniatitina
|
Superfamily:
|
Shumarditoidea
|
Family:
|
Shumarditidae
|
Genus:
|
Shumardites
|
Species:
|
simondsi+ |
Qualifier:
|
ss |
Author:
|
Smith 1903,p.135
|
Lower Boundary:
|
UTX Graford Fm.--Brad Fm., 305.3 million years
|
Upper Boundary:
|
UTX Graham Fm. top, 301 million years
|