Suborder:
|
Goniatitina
|
Superfamily:
|
Neoglyphioceratoidea
|
Family:
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Cravenoceratidae
|
Subfamily:
|
Cravenoceratinae
|
Genus:
|
Cravenoceras |
Qualifier:
|
ge |
Author:
|
Bisat 1928, p. 132
|
Lower Boundary:
|
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
|
Upper Boundary:
|
Arnsbergian--Chokierian [ARN--CHO], 319 million years
|