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A) Tarsal claw of the mayfly larva Baetis vardarensis. Abreviations: ug unguitractor, th theeth, s sensilla. B) Tarsal claw of the second leg of caddies larva from Rhyacophila sp. dorsalis group, C) Double claws of the stream stonefly larva Perla marginata, D) Circlet of hooks on the proleg of a Chironomidae larva. Reproduced from [18].
