ern regions of the European part, in Urals, Siberia, and in the Far East. Such region as Middle Russia is quite well-studied in this context, about 250 linyphiid species are registered here [Seyfulina, Kartsev, 2011; Nentwig et al., 2019]. Any unknown to science species are found extremely rare (e.g. Tanasevitch, Esyunin, 2013), and new taxonomic material concerns mainly the contribution to regional fauna. In current study, a number of species are reported for the first for Middle Russia, as well as for one part of this territory, namely Moscow Area. Up to date, the local checklist includes 164 linyphiid species. The bulk of them (142 sp.) were published in the Spider catalogue of the Moscow Region [Mikhailov, 1983], another 17 species were added to the list by Tanasevitch [2008a] and Seifulina [2008]. Recently, the database was widened after our inventory work in the Prioksko-Terrasny Nature Reserve [Seyfulina, 2017], further results of which are presented here. Material and Methods Linyphiidae specimens were collected by the author during inventory study of the Prioksko-Terrasnyi State Biosphere Reserve, initiated in 2014. The Reserve is located in the south of Moscow Area on the left side of Oka river (N 54°52' E 37°36, Fig. 1). It covers the territory about 50 sq. kilometers and contains different types of forest, dry and lowland meadows, steppe patches, small lakes, rivers, and sphagnum bogs. Material for this paper was gathered by using pitfall traps and sifter in four type of forests, in two different meadows, as well as on the water sides. Specimens listed below are verified by Dr A.V. Tanasevitch and kept in the Reserve (PTSBR). Abbreviations of the names of palp and epigyne are following: DPs-the distal part of the scape; LChlamella characteristica. Other abbreviations: p.t.-pitfall traps; s.l.-same locality. ABSTRACT. 12 spider species of fam. Linyphiidae are reported as the first records in Moscow Area (Russia), one of which is new also for the fauna of Middle Russia (Improphantes complicatus). Comments with species distribution and early records from the country, as well as taxonomical and biological notes are attached to the list. New synonym is proposed: Incestophantes australis (Gnelitsa, 2009) = Incestophantes crucifer (Menge, 1866), syn.n. (valid name on the right). How to cite this article: