Abstract
This is the first record of Pontaralia beklemichevi Mack-Fira, 1968 since its original description from Romania. Found in Lake Middle Kaban (Kazan, the Middle Volga basin), this species is new for Russian fauna. It is a relict of Ponto-Aral-Caspian that has recently invaded the Middle Volga basin. In the morphology of the male reproductive system, larger cirrus spines were noted in comparison with the original description.