Zoogeographic characteristics of fauna of gadflies (Diptera, Tabanidae) of the Central Yakutia

In the pastures of cattle and horses in Central Yakutia, 21 species and one subspecies of the gadflies belonging to 2 genera were found: Chrysops (6 species) and Hybomitra (15 species and one subspecies). In addition, there are varieties (dark forms) of two types: Hybomitra bimaculata var. bisignata and H. montana var. flaviceps. In Central Yakutia, the genus Hybomitra is the most diverse species. The dominant ones were Hybomitra montana montana (ID 45.29 %), H. lundbecki lundbecki (ID 24.97 %) and H. ciureai (ID 11.20 %), subdominating - H. arpadi (ID 5.85 %), H. nitidifrons (ID 4.03 %) and H. nigricornis (ID 2.97 %). In total, these species accounted for 94.31 % of the collection. Two more species were small H. lurida (ID 1.88 %), H. lundbecki sibiriensis (ID 1.13 %), which amounted to 3.1 % in collections. The remaining 13 species and one subspecies belong to the rare group and account for 2.59 % of the charges. The zoogeographic structure of the fauna of the gadflies of Central Yakutia, which is part of the subzone of the middle taiga, is of a mixed nature and is represented by three types of Palaearctic fauna: Boreasian (19 species, one subspecies), Afroevrazian arid (1 species) and East Asian (1 species). The Boreasian type is the most diverse species. Species of the Boreasian type of fauna belong to 4 faunistic complexes: tundra - 2 species, taiga - 14 species and one subspecies, East Siberian forest - 1 species and forest-steppe - 2 species. The Afroevrazian arid fauna type includes a steppe complex represented by one species. The East Asian fauna type consists of a Japanese-Chinese faunal complex, which includes 1 species.