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Suborder:
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Anarcestina
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Superfamily:
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Triainoceratoidea
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Family:
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Pharciceratidae
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Subfamily:
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Pharciceratinae |
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Qualifier:
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fs |
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Author:
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Hyatt 1900,p.336
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Lower Boundary:
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UD3B--UD3C:(delphinus Zone base) [14,55], 368 million years
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Upper Boundary:
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UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
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