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Suborder:
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Goniatitina
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Superfamily:
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Gastrioceratoidea
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Family:
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Reticuloceratidae
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Subfamily:
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Surenitinae |
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Qualifier:
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fs |
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Author:
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Ruzhencev & Bog. 1975,p.52
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Lower Boundary:
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RUS Nm2a2--Nm2b1,Reticuloc.-Bashkortoc.G, 317.2 million years
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Upper Boundary:
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Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
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