Suborder:
|
Goniatitina
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Superfamily:
|
Pericycloidea
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Family:
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Rotopericyclidae
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Subfamily:
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Trimorphoceratinae
|
Genus:
|
Trimorphoceras
|
Species:
|
absolutum+ |
Qualifier:
|
ss |
Author:
|
Ebbighausen et.al. 2010, c. 185
|
Lower Boundary:
|
GBY Courceyian--lower Chadian, 347.5 million years
|
Upper Boundary:
|
Chadian--Arundian [V1a--V1b] [CHD--ARU], 344.5 million years
|