Upper Albian and Lower Cenomanian ammonites from the Main Street Limestone, Grayson Marl and Del Rio Clay in northeast Texas

A total of 30 ammonite species are described, of which Moremanoceras flexuosum, Stoliczkaia (Stoliczkaia) conlini, and Neophlycticeras (Neophlycticeras) fascicostatum are new.