Plethobasus

Plethobasus is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels.

Species
Species within the genus Plethobasus include:
 * Plethobasus cicatricosus (white warty-back pearly mussel)
 * Plethobasus cooperianus (orange-footed pimpleback mussel)
 * Plethobasus cyphyus (sheepnose mussel)