First data on the fauna of spiders (Arachnida: Araneae) of the state nature monument “Kamenny lake tract” (Kostanay region, Kazakhstan)

This article provides the first information on the species diversity of spiders (Arachnida: Araneae) of the State Nature Monument «Kamenny Lake Tract (Urochische Kamennoye Ozero)», located in the subzone of droughty forb – feather grass steppes on southern chernozem of the steppe zone of Kazakhstan (Kostanay region). The material was collected using generally accepted methods (mowing with an aerial entomological net, hand collections) in 2014-2017, 2022-2023, 2025 from the end of May to the first days of June in different soil and vegetation conditions - from a steppe area, meadows with shrubs along the slope of the ancient bed of the pra-Tobol River to a birch forest with an admixture of aspen and vegetation near water sources (springs, the shore of Kamennoye Lake). As a result of the investigation, the habitat of 66 spider species from 48 genera was established, among which the most diverse were representatives of the families Araneidae (13 species, 19,7% of the total number of registered species) and the families Lycosidae (9 species, 13,6 % of the total number of registered species). Three species of spiders are recorded for the fauna of Kazakhstan for the first time: Hypsosinga heri (Hahn, 1831), Hypomma fulvum (Bösenberg, 1902), Pistius truncatus (Pallas, 1772), Tetragnatha dearmata Thorell, 1873.