Suborder:
|
Goniatitina
|
Superfamily:
|
Cycloloboidea
|
Family:
|
Cyclolobidae
|
Subfamily:
|
Cyclolobinae
|
Genus:
|
Changhsingoceras
|
Species:
|
sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
|
Paratirol./Shevyrev.--Pseudosteph./Tap., 253 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|