Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Girtyoceratidae
|
Subfamily:
|
Sudeticeratinae
|
Genus:
|
Sudeticeras
|
Species:
|
alaskae |
Qualifier:
|
ss |
Author:
|
Gordon 1957,p.48
|
Lower Boundary:
|
UAK Alapah Lst. base, 333.5 million years
|
Upper Boundary:
|
UAK Alapah Lst. top, 326.4 million years
|