Suborder:
|
Goniatitina
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Superfamily:
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Gonioloboceratoidea
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Family:
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Gonioloboceratidae
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Genus:
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Okafujiceras
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Species:
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isaense+ |
Qualifier:
|
ss |
Author:
|
Nishida & Kyuma 1982,p.40
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Lower Boundary:
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U Halian--Bloydian, Brentwood base, 313 million years
|
Upper Boundary:
|
UAR Brentwood Lst.--Woolsey, 312.5 million years
|