Maximum statistical parsimony networks of the sibling species pairs A Pterostichus nigrita Paykull, 1790 (green) and Pterostichus rhaeticus Heer, 1837 (blue) and B Pterostichus adstrictus Eschscholtz, 1823 (yellow) and Pterostichus oblongopunctatus (Fabricius, 1787) (red). Used parameters included default settings for connection steps, gaps were treated as fifth state. Each line represents a single mutational change whereas small black dots indicate missing haplotypes. The numbers of analyzed specimens (n) are listed, whereas the diameter of the circles is proportional to the number of haplotypes sampled (see given open circles with numbers). Scale bars 1 mm. Beetle images were obtained from www.eurocarabidae.de except Pterostichus adstrictus (photographer: Ditta Balke).