The first fossil insects from the marine Oligocene Menilite Formation in Poland (Odonata, Coleoptera)

Lestes polonicus sp. nov. and Calosoma winnicaensis sp. nov., respectively, the first Oligocene Lestidae and Carabidae from Poland, are described from the marine Menilite Formation. Lestes polonicus sp. nov. is the ninth species of the Eocene-Oligocene Lestes group with a longitudinal intercalary row of cells in the area between MP and CuA, confirming its abundance and diversity during this period, and extending its distribution to the easternmost part of Central Europe. This group has not been recorded later during the Miocene and Pliocene. With the described species, the genus Calosoma seems to have been as diverse during the Oligocene as it is today in Europe.