The First Record of Branchinecta orientalis G.O. Sars, 1901 (Crustacea, Branchiopoda, Anostraca) in Western Siberia

Data on the first reliable record of Branchinecta orientalis G.O. Sars, 1901 in Western Siberia are presented. This species was found in July 2022 in a small brackish lake Bolshoi Sor, Kulunda District, on the plain part of Altai krai. Data on the species morphology and size of adult individuals are given; the geographical location of the water body and its ecological characteristics are provided.