EN
The following subgeneric names are synonymized: Vertigo s. str. O. F. Müller, 1774 = Isthmia Gray, 1821 = Alaea Jeffreys, 1830 = Angustula Sterki, 1888 syn. n. = Vertillaria Pilsbry, 1919 syn. n. = Ungulidenta Popova et Shileyko, 1981 syn. n.; Vertilla Moquin-Tandon, 1855 = Alloptyx Pilsbry, 1953 syn. n. = Angustella Steklov, 1967 syn. n. Of the two resulting subgenera Vertilla Moquin-Tandon, with the type species V. angustior Jeffreys, includes also V. angulifera O. Boettger, V. oecsensis (Halaváts), V. bicolumellata Steklov and V. hinkleyi Pilsbry; Vertigo s. str., with the type species V. pusilla O. F. Müller, includes all the remaining members of the genus.