Suborder:
|
Tornoceratina
|
Superfamily:
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Prionoceratoidea
|
Family:
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Gattendorfiidae
|
Genus:
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Zadelsdorfia
|
Species:
|
stummi |
Qualifier:
|
ss |
Author:
|
Miller & Garner 1955,p.125
|
Lower Boundary:
|
UMI Marshall Sdst.II base, 353 million years
|
Upper Boundary:
|
UMI Marshall Sdst.II top, 351 million years
|