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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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Species:
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bindemanni |
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Qualifier:
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sy |
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Author:
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Nicolaus 1963,p.124
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Valid:
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Cowdaleoceras araneum (Nicolaus 1963) |
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Lower Boundary:
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DER Go alpha 1--Go alpha 2 [11.00], 333 million years
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Upper Boundary:
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DER Go alpha 3--Go alpha 4 [13.00], 332 million years
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