Suborder:
|
Anarcestina
|
Superfamily:
|
Beloceratoidea
|
Family:
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Gephuroceratidae
|
Subfamily:
|
Gephuroceratinae
|
Genus:
|
Maternoceras |
Qualifier:
|
ge |
Author:
|
Clausen 1971,p.196
|
Lower Boundary:
|
UD1E--UD1F:P.luth.--P.alveolatus [02,30], 381.1 million years
|
Upper Boundary:
|
UD1J--UD1K:paradox.--A.varicosum [04,85], 376.9 million years
|