Suborder:
|
Tornoceratina
|
Superfamily:
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Pseudohaloritoidea
|
Family:
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Pseudohaloritidae
|
Subfamily:
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Shouchangoceratinae
|
Genus:
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Erinoceras
|
Species:
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zhongguoense |
Qualifier:
|
sn |
Author:
|
Xu 1977,p.560
|
Lower Boundary:
|
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|
Upper Boundary:
|
Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
|