Suborder:
|
Paraceltitina
|
Superfamily:
|
Xenodiscoidea
|
Family:
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Pleuronodoceratidae
|
Genus:
|
Pleuronodoceras
|
Species:
|
liuchengense |
Qualifier:
|
ss |
Author:
|
Zhao et al. 1978,p.148
|
Lower Boundary:
|
Pseudosteph./Tap.--Pseudotir./Pleuron., 252.5 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|