Suborder:
|
Tornoceratina
|
Superfamily:
|
Prionoceratoidea
|
Family:
|
Prionoceratidae
|
Subfamily:
|
Prionoceratinae
|
Genus:
|
Balvia
|
Subgenus:
|
Kenseyoceras |
Qualifier:
|
gy |
Author:
|
Selwood 1960,p.171
|
Valid:
|
Balvia Lange,1929 [TAX3005 ] |
Lower Boundary:
|
UD6B--UD6C1 Kamptoclym. endogona base, 362.4 million years
|
Upper Boundary:
|
UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years
|