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Suborder:
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Goniatitina
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Superfamily:
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Neoicoceratoidea
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Family:
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Paragastrioceratidae
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Subfamily:
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Atsabitinae |
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Qualifier:
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fs |
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Author:
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Furnish 1966,p.278
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Lower Boundary:
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Asselian--Sakmarian [ASS--SAK], 294.6 million years
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Upper Boundary:
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Sakmarian--Artinskian [SAK--ART], 284.4 million years
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