Suborder:
|
Tornoceratina
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Superfamily:
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Pseudohaloritoidea
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Family:
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Pseudohaloritidae
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Subfamily:
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Shouchangoceratinae
|
Genus:
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Shouchangoceras
|
Species:
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americanum |
Qualifier:
|
ss |
Author:
|
Frest et al. 1981,p.33
|
Lower Boundary:
|
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|
Upper Boundary:
|
lower Capitanian--upper Capitanian, 263 million years
|