A study of cuticular structures in 10 species from different phylogenetic lineages of Apataniidae enabled determination of the repertoire of antennal sensory surface which includes 8 types and subtypes of sensilla: long trichoid, curved trichoid, chaetoid, mushroom-like pseudoplacoid, spear-like pseudoplacoid, basiconic and coronary sensilla, as well as Bohm's bristles. Major distribution patterns of sensilla in Apataniidae were established. Trends in the evolution of antennal structures within the endemic tribes Baicalinini and Thamastini of Lake Baikal were revealed.