Representative images of analyzed beetle species A Abax parallelepipedus (Piller & Mitterbacher, 1783) B Molops piceus (Panzer, 1793) C Poecilus versicolor (Sturm, 1824) D Pterostichus (Eosteropus) aethiops (Panzer, 1796) E Pterostichus (Omaseus) melanarius (Illiger, 1798) F Pterostichus (Oreophilus) multipunctatus (Dejean, 1828) G Pterostichus (Bothriopterus) quadrifoveolatus Letzner, 1852 H Pterostichus (Argutor) vernalis Panzer, 1796 and I Stomis pumicatus (Panzer, 1795). Scale bars: 1 mm. All images were obtained from www.eurocarabidae.de.