Suborder:
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Goniatitina
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Superfamily:
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Dimorphoceratoidea
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Family:
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Girtyoceratidae
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Subfamily:
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Girtyoceratinae
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Genus:
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Girtyoceras
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NomSpecies:
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modestum
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Species:
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modestum |
Qualifier:
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ss |
Author:
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Ruzhencev & Bog. 1971,p.174
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Lower Boundary:
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RUS Nm1a1 base, Hypergon.-Ferganoc. GZ, 327.8 million years
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Upper Boundary:
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RUS Nm1a2--Nm1b1,Uralopron.-Cravenoc. GZ, 326.4 million years
|