Аннотация:Despite huge progress in systematics of bats and in particular Vespertilionidae family in latest years, taxonomic position of number of remarkable bat species was uncertain till the present time, partly because of limited acceptable comparative material. So called “Pipistrellus” stenopterus by various authors was placed into Nyctalus (because of common adaptive features) or Pipistrellus (on the grounds of karyology) or even in Hypsugo. It was usually treated as a member of its own species group, but name of genus rank was not ever suggested for it.
Morphological comparison of “P.” stenopterus with members of Nyctalus, Pipistrellus, Scotozous, Glischropus and Philetor, as well as with some other Vespertilioninae demonstrate that on the one hand it is most probably member of the tribe Pipistrellini, i.e. by complex outer incisors, type of lower molars and general structure of baculum. Meantime it possess unique cranial proportions, dental and bacular features, which distinguish “P.” stenopterus from all the mentioned genera. At least on the base of morphology, ”stenopterus” species group should be considered a separate genus, no less distinct from Pipistrellus as Nyctalus and Glischropus are.