Suborder:
|
Goniatitina
|
Superfamily:
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Goniatitoidea
|
Family:
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Agathiceratidae
|
Genus:
|
Agathiceras?
|
Species:
|
stenosellatus |
Qualifier:
|
ss |
Author:
|
Liang & Liu 1987,p.741
|
Lower Boundary:
|
UAR Upper Atoka Fm. top, 308.6 million years
|
Upper Boundary:
|
RUS Miachkovian--Zhigulian [MYA--ZHI], 306.5 million years
|