Suborder:
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Tornoceratina
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Superfamily:
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Dimeroceratoidea
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Family:
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Cheiloceratidae
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Genus:
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Raymondiceras
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Species:
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inceptum |
Qualifier:
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ss |
Author:
|
Petersen 1975,p.23
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Lower Boundary:
|
P.delph.--low.Platyclym.annulata IIIb/IV, 367.6 million years
|
Upper Boundary:
|
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|