Suborder:
|
Goniatitina
|
Superfamily:
|
Pericycloidea
|
Family:
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Muensteroceratidae
|
Genus:
|
Cluthoceras
|
Species:
|
involutum |
Qualifier:
|
ss |
Author:
|
Pareyn 1961,p.126
|
Lower Boundary:
|
DZA Saoura S4a--S4b, 325.5 million years
|
Upper Boundary:
|
DZA Saoura S4b--S4c, 324 million years
|