Suborder:
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Goniatitina
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Superfamily:
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Neoglyphioceratoidea
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Family:
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Neoglyphioceratidae
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Subfamily:
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Neoglyphioceratinae |
Qualifier:
|
fs |
Author:
|
Plummer & Scott 1937,p.185
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Lower Boundary:
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DER Go beta--gamma, granos.base [P1--P2], 328.2 million years
|
Upper Boundary:
|
DER E2b--E2c(Cravenocerat.--Nuculoceras), 321 million years
|