The Cahaba pebblesnail, scientific name Clappia cahabensis, is a species of very small freshwater snail, aquatic gastropod mollusks in the family Lithoglyphidae.

[1] It was thought to be extinct because of water pollution coming from modern surface mining of coal in the USA.

[3] Until recently the Cahaba pebblesnail was believed to be extinct, one of 34 snail species fallen victim to dams built along the Coosa River between 1917 and 1967.

In 2004 however, biologists discovered the snail living less than fifty miles to the west, in Alabama's Cahaba River, which parallels the Coosa.

Aperture subcircular, slightly flaring, holostomatous and attached to the body whorl only at its upper part.

251167, from the Cahaba River, 1 mile north of Centreville, Bibb Co., Alabama, Leslie Hubricht collector, Nov. 18, 1964.

This species differs from C. clappi by being proportionately more attenuate, having a smaller umbilicus and a less flaring margin of the aperture.