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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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Gastrioceratidae
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Genus:
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Gastrioceras
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Species:
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adaense |
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Qualifier:
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ss |
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Author:
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Miller & Owen 1944,p.423
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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 Morrowan (Bloydian)--Atokan[MOR--ATO], 310.4 million years
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