Isoperla pseudosimilis Szczytko & Kondratieff

2015 was described from upstate New York and is currently known from the New England states south to North Carolina and Tennessee (DeWalt et al. 2018). This montane species was likewise expected from Maryland and all material determined by the author in the mid-1990s as I. similis (Hagen, 1861) were newly determined as I. pseudosimilis using Szczytko & Kondratieff (2015) (Fig. 27).