Description:
<jats:title>Abstract</jats:title><jats:p>Generic redefinitions of Yavanna Szeptycki and Nosekiella Rusek based on type species are presented. Four new species of Yavanna are described: Yavanna baikalica n. sp., Yavanna chimitovae n. sp., Yavanna babenkoi n. sp., and Yavanna stebaevae n. sp. from Siberia. Nosekiella danica (Tuxen) is redescribed, and Nosekiella behanae Nosek and Nosekiella sinensis Bu & Yin are transferred to Yavanna. A key to the Nosekiella group of genera is provided, as well as a key to the known Yavanna spp.</jats:p>