EN
This paper contains the second record and locality of S. petruschewskii in Poland. This nematode was found on the catfish (Ictalurus nebulosus L.) from the Odra River in Wrocław (Lower Silesia). S. petruschewskii have been described only in Gymnocephalus cemuus from the Szczecin Firth until now. The authors gave the illustrations (with dimensions) of this species, according to the material from the catfish.