New records of linyphiid spiders of the Caucasus and Crimea, Russia (Aranei: Linyphiidae)

New faunistic records of linyphiid spiders from the Caucasus and Crimea are presented. Crosbyarachne bukovskyi Charitonov, 1937 is recorded in the Caucasus for first time. The male genitalic structures of Metopobactrus ascitus (Kulczynski, 1894) are illustrated in detail, a photo of the epigyne of Stemonyphantes agnatus Tanasevitch, 1990 is given. Three species from the list below, Asthenargus caucasicus Tanasevitch, 1987, Mansuphantes ovalis (Tanasevitch, 1987) and T. aequalis (Tanasevitch, 1987), are presumed to be endemic to the Caucasus. Considering the new data, the faunas of linyphiid spiders of the Caucasus and Crimea comprise at least 212 and 94 species, respectively. well studied. In two fundamental papers on Caucasian Linyphiidae [Tanasevitch, 1987, 1990], 161 species were recorded in the regional fauna, including 32 described as new. As subsequent studies have increased the number of Caucasian linyphiids by 1.5 times [Ponomarev, Volkova, 2013; Martynovchenko, Mikhailov, 2014; Ponomarev, Chumachenko, 2014, etc.], the regional fauna is presently known to contain at least 212 species [Otto, 2022, albeit with a few omissions]. The fauna of Crimean Linyphiidae has been summarized in detail in the catalog by Kovblyuk & Kastrygina [2015]. Considering a few species added since to the list by Kovblyuk et al. [2015], Nadolny [2020], Gnelitsa [2021], the fauna of the peninsula currently consists of 94 species. In 2022 and 2023, during a short trip across the Caucasus and Crimea, a small collection of linyphiid spider was taken. Altogether, this material contains 37 known species, one of which being new to the fauna of the Caucasus.