Suborder:
|
Anarcestina
|
Superfamily:
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Anarcestoidea
|
Family:
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Holzapfeloceratidae
|
Genus:
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Holzapfeloceras
|
Species:
|
circumflexiferum |
Qualifier:
|
ss |
Author:
|
Sandberger & Sandb. 1852,p.111
|
Lower Boundary:
|
Eifel.--Givetian [dm96:08,20] [EIF--GIV], 391.8 million years
|
Upper Boundary:
|
mid.--up.varcus Zone [17,00], 389 million years
|