Patera perigrapta (Pilsbry, 1894) Engraved Bladetooth
Pendleton Bend COE Campground on the Delta along the banks of the Arkansas River in a hydric hammock, Lincoln Co., Arkansas (GPS: 33.59280N 091.20490W). W. H. McCullagh, Jr! October 10-11, 2012 (18.6 mm.)