Suborder:
|
Goniatitina
|
Superfamily:
|
Neoglyphioceratoidea
|
Family:
|
Cravenoceratidae
|
Subfamily:
|
Cravenoceratinae
|
Genus:
|
Cravenoceras?
|
Species:
|
latecostatum |
Qualifier:
|
ss |
Author:
|
Patteisky 1923,p.26
|
Lower Boundary:
|
DER lowest E1--E1 alpha, 326 million years
|
Upper Boundary:
|
Pendleian--Arnsbergian [PND--ARN], 324 million years
|