Ecological and faunistic assessment of the mollusk Radix (radix) auricularia (Linnaeus, 1758) along the longitudinal profile of the river Samara

As a result of the research on the malacofauna in the Samara river, it was found that the mollusk is not found throughout the river R. (R.) auricularia. We also analyzed the obtained quantitative indicators of the species at different stations. The main environmental factors determining the distribution and development of the species along the longitudinal profile of the river were established.