The shell is described as thin and "egg-shaped"[3] with very rounded whorls. The spire is short, and the apex may become worn out in older specimens.[3] The name malleatus derives from Latinmalleāre (to hammer) and refers to the "hammered-like sculpture" often found on the shell of this species.[3]
References
^ abWalker, Bryant (1918). A synopsis of the classification of the fresh-water Mollusca of North America, north of Mexico, and a catalogue of the more recently described species. Ann Arbor: The University of Michigan.
