Arthropoda Selecta 16 (1): 2328 © ARTHROPODA SELECTA, 2007 Four new species of the spider family Linyphiidae (Aranei) from clay semidesert of Western Kazakhstan ×åòûðå íîâûõ âèäà ïàóêîâ ñåì. Linyphiidae (Aranei) èç ãëèíèñòîé ïîëóïóñòûíè Çàïàäíîãî Êàçàõñòàíà Andrei V. Tanasevitch* & Tatyana V. Piterkina ** À.Â. Òàíàñåâè÷* è Ò.Â. Ïèòåðêèíà** * Centre for Forest Ecology and Production, Russian Academy of Sciences, Profsoyuznaya Str., 84/32, Moscow 117997, Russia. E-mail:
[email protected] * Öåíòð ïî ïðîáëåìàì ýêîëîãèè è ïðîäóêòèâíîñòè ëåñîâ ÐÀÍ, Ïðîôñîþçíàÿ óë. 84/32, Ìîñêâà 117997, Ðîññèÿ. **Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect, 33, Moscow 119071, Russia. E-mail:
[email protected] ** Èíñòèòóò ïðîáëåì ýêîëîãèè è ýâîëþöèè ÐÀÍ, Ëåíèíñêèé ïðîñïåêò, 33, Ìîñêâà 119071, Ðîññèÿ. KEY WORDS: Spiders, Linyphiidae, new species, Kazakhstan, desert steppe. ÊËÞ×ÅÂÛÅ ÑËÎÂÀ: Ïàóêè, Linyphiidae, íîâûå âèäû, Êàçàõñòàí, îïóñòûíåííûå ñòåïè. ABSTRACT. Four species of the family Linyphi- Material and methods idae, i.e., Improphantes contus sp.n., Silometopus cras- sipedis sp.n., Trichoncus villius sp.n., and Walckenaeria The material was collected from April to October stepposa sp.n. are described from clay semidesert of in 2004 and 2005 on the territory of the Dzhanybek Western Kazakhstan (environs of Dzhanybek). Research Station (DRS) of the Institute of Forestry, Russian Academy of Sciences, in the environs of Dzh- ÐÅÇÞÌÅ. Èç ãëèíèñòîé ïîëóïóñòûíè Çàïàäíî- anybek village (49o23' N, 46o47,5' E). DRS is situated ãî Êàçàõñòàíà (îêð. ïîñ. Äæàíûáåê) îïèñàíû 4 âèäà in the westernmost point of Kazakhstan, just near the ïàóêîâ ñåì. Linyphiidae: Improphantes contus sp.n., border with Volgograd Province of Russia. The area Silometopus crassipedis sp.n., Trichoncus villius sp.n.