About Vallonia pulchella (O.F.Müller, 1774)
For explanation of terminology used here, see gastropod shell. The shell of Vallonia pulchella is circular in outline, with 3.2 to 3.3 whorls. The final whorl becomes wider immediately before the aperture, and does not descend much. Compared to the related species Vallonia costata, the aperture of Vallonia pulchella is not very oblique, and its lip is weaker than the lip of Vallonia costata. Vallonia pulchella also has slightly more elevated whorls than Vallonia costata. Like all other species in the genus Vallonia, Vallonia pulchella has a very wide umbilicus. The shell is ivory-white, marked with very fine and irregular streaks. The soft body parts are milky white. The tentacles are short, and the posterior end of the foot is round. This species is distributed across multiple countries and islands. In Europe, it is found in Great Britain, Ireland, Czech Republic, Slovakia, Poland, Ukraine, Germany, Netherlands, Latvia, and other areas. In America, it occurs in British Columbia (Canada), Illinois (United States of America), and Brazil. It is also found in Tatarstan, Kazan.
