Seasonal variation of spider species composition in Volgograd agglomeration

The article addresses changes in the species composition of spiders during the warm season. The qualitative and quantitative characteristics of the spider community were analyzed during the most important periods of their activity in the main biotopes of the Volgograd agglomeration. The Cluster Analysis application, based on the Jaccard index, was used. The material was collected using 10 mm Barber soil traps with a fixing liquid (6% acetic acid solution). In total, 235 species of spiders belonging to 26 families were identified, including 195 species belonging to 23 families on the territory of Volgograd. Notably, 155 species were new to the fauna of the Volgograd region. Species Trichoncus villius Tanasevitch et Piterkina was found in the Russian Federation for the first time. The species composition was analyzed during critical periods of spider life: the end of winter diapause, the time before the summer diapause, the termination of summer diapause, and the period of before winter the diapause...