Suborder:
|
Paraceltitina
|
Superfamily:
|
Xenodiscoidea
|
Family:
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Pleuronodoceratidae
|
Genus:
|
Rotodiscoceras
|
Species:
|
sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
|
Pseudotir./Pleuron.--Rotodiscoceras beds, 252 million years
|
Upper Boundary:
|
Rotodiscoceras top, 251.5 million years
|