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Suborder:
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Tornoceratina
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Superfamily:
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Praeglyphioceratoidea
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Family:
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Sporadoceratidae
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Genus:
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Cryptoclymenia |
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Qualifier:
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gy |
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Author:
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Hyatt 1884,p.314
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Valid:
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Sporadoceras Hyatt 1884,p.321 |
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Lower Boundary:
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UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
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Upper Boundary:
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UD5C--UD6A1: Sphenoclym.brevispina base, 364 million years
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