The shell is dark purple to black in colour, semiglobose, with an axial microsculpture made up of thin but deep radial striae. apex often eroded. Periostracum very glossy. The species, always rare, is endangered in all its distribution range, due to an intense antropic activity in the summer months (Taybi w& al.: “he freshwater malacological composition of Moulouya’s watershed and Oriental Morocco”, Journal of materials and Environmental Sciences vol.8(4), Oujda 2017, p.1404.