Suborder:
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Tornoceratina
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Superfamily:
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Prionoceratoidea
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Family:
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Prionoceratidae
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Subfamily:
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Prionoceratinae
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Genus:
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Paragattendorfia
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Species:
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humilis+ |
Qualifier:
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ss |
Author:
|
Schindewolf 1924,p.105
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Lower Boundary:
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Devonian--Carboniferous Boundary [DCB], 359.2 million years
|
Upper Boundary:
|
low.Tournais.--mid.Tournais. [Tn1--Tn2], 357.5 million years
|