About Asianellus festivus (C.L.Koch, 1834)
Like many jumping spiders, Asianellus festivus shows sexual dimorphism in both size and coloration. For collected specimens from Serbia, males had a body length of 6 mm, while females measured 7.8 mm and 8.0 mm. Literature records state male body length can reach 6-7 mm, and female body length ranges from 6.5-8.5 mm. The epigyne features sclerotized copulatory openings and an epigynal pocket. The male pedipalp has a tibial apophysis with two processes of unequal length, plus a thin, coiled embolus. A. festivus has a broad distribution across the Palearctic region. It occurs throughout Europe, the Caucasus, Russia (from European Russia to the Far East), Kazakhstan, China, Korea, and Japan. In recent years, the species has been newly recorded in several countries, including Lithuania and Serbia. Stanković classifies it as a trans-Eurasian temperate species. Within China, it has been documented across many provinces: Beijing, Hebei, Inner Mongolia, Jilin, Heilongjiang, Zhejiang, Anhui, Shandong, Hunan, Guangxi, Guizhou, Tibet, Shaanxi, and Gansu. This species lives in dry, mostly sunny locations, and often prefers rocky terrain. It can also be found in warm, sunny rock fields and slopes, as well as in grass, areas dominated by mosses or lichens, dry grasslands, and habitats with very sparse or no vegetation. Adults of both sexes are active from March to November, with peak activity occurring between May and September. Some sources report different activity ranges: males are active from March to September, and females are active from March to August.
