Suborder:
|
Agoniatitina
|
Superfamily:
|
Mimoceratoidea
|
Family:
|
Mimosphinctidae
|
Subfamily:
|
Anetoceratinae
|
Genus:
|
Nandanoceras |
Qualifier:
|
gn |
Author:
|
Ruan 1988 (nom.nud.)
|
Valid:
|
Ruanites Yatskov 1990 |
Lower Boundary:
|
CNG Tangdin Fm. base, 406.4 million years
|
Upper Boundary:
|
CNG Tangdin Fm.--Lower Tangxiang Fm., 405.8 million years
|