Species diversity of the genus Kephyrion Pascher in the basin of the Sabun River (subzone of northern taiga in western Siberia) is discussed. Its territory holds the Sibirskie Uvaly Nature Park. The genus Kephyrion is represented by 16 specimens in the basin of the Sabun River and by 14 specimens in the bodies of water of the park. Their temperature, visibility, and active reaction of water stimulating vegetation have been identified. Five species and one variety of the genus have been for the first time registered in the flora of western Siberia.
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