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 Acanthomegabunus sibiricus Tsurusaki, Tchemeris & Logunov, 2000 Acanthomegabunus sibiricus Tsurusaki et al . 2000b: 74 , figs 1– 4. Acanthomegabunus sibiricus Tchemeris 2015: 568 , figs 1, 5, 14–15, 17. Comments. Acanthomegabunus sibiricus is the only species previously known from the Katunsky Biosphere Reserve. The species was recorded from the vicinity of Srednee Multinskoe Lake (erroneously named Srednee Kuktinskoe Lake) ( Tchemeris 2015 ). The lake is actually located outside the reserve, close to its northern border where the reserve’s ranger station is situated, although this record requires confirmation because it is based on a single female. A closely related species, A. altaicus Tchemeris, 2015 , may also occur there—its type locality lies close to the Katunsky Reserve ( East Kazakhstan Area, Katon-Karagaiskii Districts). Habitat. Mountain moss-stony tundra, moss-pebble riverbanks, Abies forest, Anemone meadows, stony debris, dark coniferous forests, and aspen-fir forests ( Tsurusaki et al . 2000b ; Trilikauskas 2016 , 2017 ). Distribution. The mountains of South Siberia, Russia : the southern part of Krasnoyarsk Territory, Altai Territory, and Altai Republic , Kemerovo Area, Khakassia , and Tuva ( Tchemeris 2015 ).