Suborder:
|
Goniatitina
|
Superfamily:
|
Shumarditoidea
|
Family:
|
Perrinitidae
|
Genus:
|
Properrinites
|
Species:
|
denhami |
Qualifier:
|
ss |
Author:
|
Miller & Furnish 1940,p.141
|
Lower Boundary:
|
UTX Lower Hueco Lst. base, 299 million years
|
Upper Boundary:
|
UTX Lower Hueco--Upper Hueco Lst., 284.4 million years
|