Abstract

Recent collections of ammonites from rocks of Cenomanian and Turonian age in Trans-Pecos Texas and adjacent Chihuahua contain representatives of the families Schloenbachiidae, Acanthoceratidae, Vascoceratidae and Anisoceratidae. From these families 12 genera (one new: Quitmaniceras) and 15 species (7 new: Euhystrichoceras adkinsi, Pseudacompsoceras bifurcatum, Pseudaspidoceras flexuosum, Acanthoceras calvertense, Quitmaniceras reaseri, Q. brandi, Eucalycoceras underwoodi) are recorded herein from the Chispa Summit and Ojinaga formations.

You do not currently have access to this article.