preliminary data of the shell morphometry of populations of zebrina detrita (mollusca: gastropoda: pulmonata) from bulgaria

Six populations of Zebrina detrita Müller, 1774 (Mollusca: Gastropoda: Pulmonata) occuring in different habitats, regions and altitude were studied by shell morphology. The width and height of the shell and its aperture were measured, and also the last whorl height. Their proportions were calculated. Some differences in the shell size were registered in populations situated at different altitude.