Atheta (Datomicra) nigra (Kraatz) A habitus B median lobe of aedeagus in lateral view C median lobe of aedeagus in ventral view D spermatheca E apical part of dorsal male abdomen showing 4 dents on tergite VIII F female tergite VIII G female sternite VIII; A, D, F, G after Klimaszewski et al. (2016a), based on female from Saskatchewan, Canada B, C after Benick and Lohse (1974) E after Klimaszewski et al. (2016a), based on a male from Germany. Scale bars: 1 mm (A); 0.2 mm (B–G).