Suborder:
|
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
|
Genus:
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Prionoceras?
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Species:
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sp.1* |
Qualifier:
|
of |
Author:
|
Chlupac & Zikmundova 1976,pl.1
|
Lower Boundary:
|
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|
Upper Boundary:
|
UD4B--UD4C: serpentina Zone base [16,45], 366.4 million years
|