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Suborder:
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Tornoceratina
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Superfamily:
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Prionoceratoidea
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Family:
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Prionoceratidae
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Subfamily:
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Acutimitoceratinae
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Genus:
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Acutimitoceras
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Subgenus:
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Acrimitoceras |
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Qualifier:
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gy |
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Author:
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Ruan 1995,p.348
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Valid:
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Nicimitoceras Korn,1993 (TAX5834 ) |
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Lower Boundary:
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Devonian--Carboniferous Boundary [DCB], 359.2 million years
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Upper Boundary:
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low.Tournais.--mid.Tournais. [Tn1--Tn2], 357.5 million years
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