Taxonomic notes and faunistic data on the Muscidae (Diptera) of the Altai Mountains (Russia) Author Vikhrev, Nikita E. Author Sorokina, Vera S. text Zootaxa 2017 4311 2 241 254 journal article 32333 10.11646/zootaxa.4311.2.5 fdec1255-5294-442c-ba54-c528020d548a 1175-5326 847538 31AAA2DE-E770-4950-AE21-E3E1D851A674 Hydrotaea unispinosa Stein, 1898 Material examined. RUSSIA : Altai Republic : 1♂ , Seminskiy Pass , Turala River valley , 50.99°N 85.68°E , 1350 m asl , 8– 13.07.2016 , leg. N. Vikhrev ( ZMUM ). Other records: RUSSIA : 1♂ , Moscow reg., Ruza env., 55.66°N 36.05°E , 1– 10.06.2016 , leg. E. Erofeeva ( ZMUM ) ; 1♂ 1♀ , Primorsky reg., Kedrovaya Pad National Reserve ( Primorsky env., 43.1°N 131.5°E ), 17– 19.08.1962 , leg. E. Nartchuk ( ZIN ) . Remarks. The taxonomy and distribution of Hydrotaea unispinosa Stein, 1898 was dicussed in Vikhrev & Gomyranov (2014) . It is an uncommon but remarkably widespread species. This species is known from: Nearctic, Canada and USA from East to West between 40°N and 50°N; Oriental, foothills in the northern part of the ecozone, India : Uttarakhand and West Bengal regions, Nepal , Thailand , Chiang Mai region; Vietnam , Lai Chau region; Palaearctic: Europe ( Sweden ); Asia ( China , Liaoning region). The record from the Altai Republic and the two further localities given above are the first findings of this species in Russia . Distribution. Holarctic and Oriental.