The amphibiotic insects of the north-east of Perm region and neighboring territories (Mayflies, Stoneflies, and Caddisflies)

Faunistic investigations of amphibiotic insects in the north-east of Perm region and neighboring territories revealed the presence of 58 species. Twenty-one species are belonged to mayflies, 20 - caddisflies, and 17 - stoneflies. Six of these species are known only by larvae, 34 - only by imagoes. One species of caddisflies is new for the Urals Mountains. Eight species of insects are recorded in the Perm region for the first time. Data on the Ural fauna of amphibiotic insects are reviewed. Some peculiar faunistic features of the mayflies, stoneflies and caddisflies inhabiting the Ural Mountains are discussed.