Tanasevitch A.V.1, Ponomarev A.V.2, Chumachenko Yu.A.3 2015. Notes on the spider genus Bisetifer Tanasevitch, 1987 (Aranei: Linyphiidae), with the description of a new species // Arthropoda Selecta. Vol.24. No.4: 445–450 [in English].

1 Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky prospect, 33, Moscow 119071, Russia. E-mail: tanasevitch@gmail.com

2 Institute of Arid Zones, Southern Scientific Centre, Russian Academy of Sciences, Chekhov str., 41, Rostov-on-Don 344006, Russia. E-mail: ponomarev1952@mail.ru

3 Caucasian State Biosphere Nature Reserve, Sovetskaya av., 187, Maykop 385000 Russia. E-mail: ychumachenko73@mail.ru

KEY WORDS: Dwarf-spiders, Erigoninae, Caucasus, Russia, Georgia, Azerbaijan, new species.

ABSTRACT: Revision of the type series of Bisetifer cephalotus Tanasevitch, 1987, shows this species to be heterogeneous and, besides the nominate form, the series to contain another, very similar, new species, B. gruzin sp.n. The female, originally described as corresponding to the male of B. cephalotus, is actually the female of the new species. The true female of B. cephalotus is described for the first time. Fresh samples from the Krasnodar Province, southern Russia and from Georgia show that B. gruzin sp.n. seems to be much more widely distributed in the Caucasus than B. cephalotus.

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