The harvestmen fauna (Arachnida: Opiliones) of the Katunsky Biosphere Reserve and adjacent territories (South Siberia, Russia), with a description of a new species of Sabacon (Sabaconidae) and notes on Sabacon sergeidedicatum Martens, 1989 Author Trilikauskas, Laimonas A. The Laboratory of Invertebrate Ecology, The Institute of Systematics and Ecology of Animals, Siberian Branch Russian Academy of Sciences, Frunze Street 11, Novosibirsk 630091, Russia. Author Azarkina, Galina N. The Laboratory of Systematics of Invertebrate Animals, The Institute of Systematics and Ecology of Animals, Siberian Branch Russian Academy of Sciences, Frunze Street 11, Novosibirsk 630091, Russia and Department of Zoology & Centre for Invasion Biology, University of Venda, Thohoyandou, 0950, South Africa. text Zootaxa 2021 2021-06-18 4990 1 117 133 journal article 5364 10.11646/zootaxa.4990.1.7 452920ba-ddea-4a3c-8a6c-97e325917d11 1175-5326 4982969 AD076194-6D97-4559-B6C9-E81CF0774BB0 Phalangium opilio Linnaeus, 1758 Farzalieva & Esyunin 2000: 189 , figs 35–46, 94. Tchemeris et al . 1999: 198 , figs 49–58. Material examined. RUSSIA : Altai Republic : Ust’ - Koksa District : 3 ♀ ( PCLT ), Katunsky Biosphere Reserve , head of the Ozernaya River , shore of Taimenye Lake , near the ranger station, [49°48’40.9–42.9”N,85°47’57.2– 57.6”E], 1509 m a.s.l. , 10.VIII.2019 ; 1 ♀ ( PCLT ), Katunsky Biosphere Reserve , vicinities of the Taimenye Lake , middle reaches of Kharyuzovka River , [ 49°48’53.6”N , 85°47’42.0”E ], 1652–1660 m a.s.l. , 11.VIII.2019 ; 1 ♀ ( PCLT ), SE shore of Taimenye Lake , [ 49°48’08.2”N , 85°48’00.5”E ], 1551 m a.s.l. , 7 – 13.VIII.2019 ; 2 ♀ ( PCLT ), Katunsky Biosphere Reserve , upper reaches of the Katun’ River , left bank of Zaichikha River near its mouth, [ 49°37’08.3”N , 85°43’03.8”E ], 1302 m a.s.l. , 15–26.VIII.2020 . Habitat. Moist and mesophytic deciduous and mixed forests and anthropogenic habitats ( Tchemeris et al. 1999 ); blueberry-green moss and grass-green moss spruce forests (in Katunsky Biosphere Reserve). Distribution. Holarctic ( Tchemeris et al. 1999 ). MAP 2. Distribution of Sabacon sergeidedicatum and Sabacon zateevi sp. nov.