Gyraulus albus (O.F.Müller, 1774)
Family: Planorbidae
Size: 1,3-1,8 x  4-7 mm
Distribution: Europe
Ecology: in standing and slowly flowing waters with plenty of vegetation
Location: Germany, Bavaria, Upper Franconia, Selbitz
leg.det. U.Schmidt, 1971
Foto: U.Schmidt, 2007