Upper Cretaceous (upper Santonian)Boehmocerasfauna from the Gulf Coast region of the United States

An upper Santonian fauna dominated by the curved baculitid Boehmoceras Riedel, 1931, occurs as phosphatic moulds in the Tombigbee Sand Member of the Eutaw Formation in Mississippi and Alabama, and also is reworked into the base of the Mooreville Chalk; a similar assemblage is present in the middle part of the Pen Formation of the Big Bend area, Texas. The assemblage is: Pseudoschloenbachia ( Pseudoschloenbachia ) mexicana (Renz, 1936),...