| | | holotype of species Isoperla felderorum Roesti, 2021 | Middle Europe, Switzerland: Switzerland, canton of Bern, Bern, Aare at Wylergut, dam of the Felsenau power station, 46.96475, 7.44487, 496 m asl, April 21, 2020, coll. Christian Roesti with Flurina and Ladina Felder |