FIGURE 1 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range

FIGURE 1. Physidae of Western and Central Europe (10.18150/YPDFJU)—general shell morphology A—Physa acuta (Phot. M. Kanturski), B—Aplexa hypnorum, C—Physa fontinalis, D—Physa gyrina; 1—front side of the shell, 2—shell from the side view, 3—back side of the shell (Phot. B–D A. Cieplok, A. Spyra).