Stan poznania i nowe dane o właściwych chrząszczach wodnych (Coleoptera) powiatu pleszewskiego (Polska Zachodnia) / State of knowledge and new data on true water beetles (Coleoptera) of the Pleszew district (Western Poland)

A total of 78 species of true water beetles were recorded in the Pleszew district during various entomological studies conducted in the years 1984-2021. The most interesting were: Agabus striolatus, Ilybius montanus, Graphoderus austriacus, G. zonatus, Dytiscus semisulcatus, Nebrioporus canaliculatus, Hydroporus nigrita, and Hydrophilus aterrimus. It was estimated that the fauna of the Pleszew district is probably rich in species and that it is an important area for the protection of water beetles. The fauna of peat bogs and stagnant waters of various kinds is valuable. Systematic surveys of this area are necessary, covering all aquatic habitats. Least is known about the fauna of running waters. Records of water beetles in terrestrial habitats and in atypical aquatic habitats were also discussed.