SCAPHITES OF THE "NODOSUS GROUP" FROM THE UPPER CRETACEOUS (CAMPANIAN) OF THE WESTERN INTERIOR OF NORTH AMERICA by Landman, N, Kennedy, W, Cobban, W, Larson, N

“…The types of both of these species were collected in the mid-19th century in what was then called Nebraska Territory, and included parts of present-day South Dakota, North Dakota, and Montana. …”