Suborder:
|
Tornoceratina
|
Superfamily:
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Tornoceratoidea
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Family:
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Tornoceratidae
|
Subfamily:
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Tornoceratinae
|
Genus:
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Kourazoceras |
Qualifier:
|
ge |
Author:
|
Becker 2002,p.176
|
Lower Boundary:
|
UD2D--UD2E:globosum--P.petterae [11,30], 372 million years
|
Upper Boundary:
|
UD2E--UD2F:petterae--P.lentiforme[11,80], 371.6 million years
|