Suborder:
|
Tornoceratina
|
Superfamily:
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Prionoceratoidea
|
Family:
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Gattendorfiidae
|
Genus:
|
Kazakhstania |
Qualifier:
|
ge |
Author:
|
Librovitch 1940,p.67
|
Lower Boundary:
|
UOH Logan Fm. base, 357.5 million years
|
Upper Boundary:
|
UMI Marshall Sdst.II top, 351 million years
|