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Suborder:
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Goniatitina
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Superfamily:
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Schistoceratoidea
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Family:
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Melvilloceratidae |
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Qualifier:
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fy |
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Author:
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Nassichuk 1975,p.133
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Valid:
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Reticuloceratidae (Surenitinae)* |
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Lower Boundary:
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U Halian--Bloydian, Brentwood base, 313 million years
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Upper Boundary:
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U Atokan--Desmoinesian [ATO--DES], 308.6 million years
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