Isoperla frisoni Illies 1966

Isoperla frisoni Illies, 1966 Notes Isoperla frisoni is commonly referred to as the Wisconsin Stripetail (Stark et al. 2012). This is a widspread species reported in Canada from Nova Scotia west to Manitoba. In the USA it occurs from Maine west across the Laurentian Great Lakes region to Minnesota, plus south mainly along the Appalachian Mountains to Georgia (Szczytko and Kondratieff 2015, DeWalt et al. 2024). Harper and Magnin (1969) suggested a univoltine-slow life cycle for a population from Quebec, with adults present from late May to early July. In New York, adults of I. frisoni have been collected between late May through early August (Fig. 38) at elevations ranging from 134-548 m asl (Fig. 39) from larger rivers and streams from Level IV Ecoregions Acid Sensitive Adirondacks (58 aa), Eastern Adirondack Foothills (58 ac), Central Adirondacks (58 ad), Champlain Lowlands (83 b), St. Lawrence Lowlands (83 d), Upper St. Lawrence Valley (83 e), and Mohawk Valley (83 f) (Fig. 41 e).