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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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Homoceratidae
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Subfamily:
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Homoceratinae |
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Qualifier:
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fs |
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Author:
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Spath 1934, p.15
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Lower Boundary:
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Arnsbergian--Chokierian [ARN--CHO], 319 million years
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Upper Boundary:
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RUS Nm2c2 top;Biling./Canc.--Bran./Gast., 313 million years
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