Suborder:
|
Anarcestina
|
Superfamily:
|
Triainoceratoidea
|
Family:
|
Triainoceratidae
|
Genus:
|
Sandbergeroceras
|
Species:
|
acutum |
Qualifier:
|
sy |
Author:
|
Termier & Termier 1950,pl.151
|
Valid:
|
Sandbergeroceras costatum (d'A. & de V.) |
Lower Boundary:
|
mid.--up.varcus Zone [17,00], 389 million years
|
Upper Boundary:
|
Givetian--Frasnian [GIV--FRS], 385.3 million years
|