Rediscovery of Stactobia eatoniella McLachlan, 1880 (Trichoptera, Hydroptilidae) in Switzerland after more than seventy years

A specimen of Stactobia eatoniella , a hygropetric species micro-caddisfly considered extinct in Switzerland, was discovered the Morge Valais March 2020 during routine monitoring. This last instar larva perfect condition is first to be observed Switzerland since 1944. Further research study area needed confirm presence possible well-established population. encouraging discovery should not hide fact that two thirds are on Red List threatened and habitats both under-studied highly endangered worldwide.