Dimensional characteristics of shells lymnaea stagnalis (gastropods) from the rybak anabranch of the Yenisei River

The quantitative characteristics of the conchological parameters of the great pond snail Lymnaea stagnalis from the Rybak anabranch of the Yenisei river are given. In total, the author processed 40 shells of mollusks. To describe the quantitative values of the parameters of individual dimension-age groups, the resulting variational series was divided into classes. The obtained data can be used for a comparative analysis of the geographical variability of this species of mollusks with that of other reservoirs, and also contribute the conduct of biomonitoring activities.