Isoperla similis (Hagen, 1861)

Grubbs, Scott A., 2018, An Update On The Stonefly Fauna (Insecta, Plecoptera) Of Maryland, Including New And Emended State Records And An Updated State Checklist, Illiesia 14 (4), pp. 65-80 : 74

Isoperla similis (Hagen, 1861)

was reported from Maryland by Duffield & Nelson (1990) ( Fig. 27 ). This species has since been redefined by Szczytko & Kondratieff (2015) and is now considered a species found mainly along the Piedmont and Atlantic Coastal Plain regions. Szczytko & Kondratieff (2015) included I. similis from Maryland based on a single female from the Blue Ridge Physiographic Province ( Fig. 27 ).

Figures

Figs. 26–27. Distribution map of four Isoperla species in western Maryland, USA, based on material examined during this study plus records in Duffield & Nelson (1990) and Szczytko & Kondratieff (2015). 26, I. gibbsae and I. kirchneri; 27, I. pseudosimilis and I. similis. MD = Maryland, PA = Pennsylvania, VA = Virginia, WV = West Virginia.