Frontal view of the embolic divisions of Dactylopisthoides hyperboreus Eskov, 1990 (A), D. wrangelianus (Marusik & Koponen, 2009) (B) and D. transbaicalicus (Marusik, Koponen & Danilov, 2001) [reproduced from Marusik and Koponen (2009)] (C). Abbreviations: dsa – distal suprategular apophysis, mm – median membrane, mt – median tooth, rt – radical tooth. Black, thick arrows show additional differences between species. Scale bar: 0.1 mm (С).