Suborder:
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Tornoceratina
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Superfamily:
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Prionoceratoidea
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Family:
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Prionoceratidae
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Subfamily:
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Prionoceratinae
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Genus:
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Irinoceras
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Species:
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stevanovici* |
Qualifier:
|
ss |
Author:
|
Kullmann 1962,p.73
|
Lower Boundary:
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RUS Nm1b1--Nm1b2 (Domb.carinat.--tectus), 324.6 million years
|
Upper Boundary:
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RUS Nm1c1--Nm1c2(uralicus--Del.bressoni), 322 million years
|