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Suborder:
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Goniatitina
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Superfamily:
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Shumarditoidea
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Family:
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Perrinitidae
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Genus:
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Perrinites
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Species:
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kempae |
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Qualifier:
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sy |
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Author:
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Plummer & Scott 1937,p.313
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Valid:
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Perrinites hilli (Smith 1903) |
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Lower Boundary:
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UTX Arroyo Fm. base, 284.4 million years
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Upper Boundary:
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UTX Arroyo Fm. top, 270.6 million years
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