EN
Features characteristic for Myotis ikonnikovi are examined; the braincase shape, the baculum construction, and the location of the upper canine grooves are the most useful characters for its diagnostics. Recognition of ‘mystacinus’ and ‘muricola’ species groups is proposed, based on dental characters. Myotis mystacinus fujiensis Imaizumi, 1954 is recognised as a junior synonym of M. ikonnikovi Ognev, 1912.