The Late Cretaceous ammonites Scaphites leei Reeside and Scaphites hippocrepis (DeKay) in the western interior of the United States

Abstract

Scaphites led Reeside and 8. hippocrepis (DeKay) are closely related ammonites found at many localities in Montana, Wyoming, South Dakota, Colorado, Utah, and New Mexico. Both species have been found in Texas, and S. hippocrepis occurs also in Alabama, Georgia, Maryland, Delaware, and New Jersey, as well as in several countries in Europe and Africa.