The shell is thick and elongate. Color is light to dark brown with green markings. There is a pronounced lumpy ridge on the posterior end. Nacre is white. Compare to Washboard.
Color is yellow or brown to dark red-brown and black.
The posterior end has a furrow or depression. The tip of the beak twists and points toward the anterior end. Nacre is white. Compare to Fusconaia and other Pleurobema species. Color is yellow or light brown to dark brown or black in old individuals.