Larvae Of North American Species Of Pteronarcys (Plecoptera: Pteronarcyidae) Author Myers, L. W. Lake Champlain Research Institute, SUNY Plattsburgh, Plattsburgh, NY 12901, U. S. A. E-mail: myerslw @ plattsburgh. edu myerslw@plattsburgh.edu Author Kondratieff, B. C. Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, Colorado, 80523, U. S. A. E-mail: boris. kondratieff @ colostate. edu boris.kondratieff@colostate.edu text Illiesia 2017 13 16 192 224 journal article http://doi.org/10.5281/zenodo.4752933 5cb57102-4f5e-4d1a-90ce-cbe06dc4b57d 1854-0392 4752933 68D355B3-CD8A-4699-AC4E-94527D18FE24 Pteronarcys dorsata ( Say, 1823 ) http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org: TaxonName:470662 ( Figs. 28–36 ) Remarks and Distribution. The geographical range of this widespread species extends from eastern North America south to Florida and Louisiana and across Canada to Alaska ( Earle 2009 , Nelson 2000 , Stewart & Oswood 2006). Mature larvae of this species can be separated from others based on the lack of abdominal projections ( Figs. 28 , 36 ), supraantennal plate developed into a semi-circular ridge ( Fig. 30 ), the presence of a convex lateral bulge on the pronotum that often exceeds the level of pronotal projections ( Figs. 32 , 36 ), and a broadly rectangular process on sternum 9 of male larvae, the resulting angle=33.11 ± 5.16 ( Figs. 29 , 35 ). Fig. 28-31. Pteronarcys dorsata . 28. Abdomen dorsal view; Michigan: Otsego Co., West Branch Sturgeon River. 29. Ventral view of process on AB 9 of male; Michigan: Otsego Co., West Branch Sturgeon River. 30. Supra-antennal process; Michigan: Otsego Co., West Branch Sturgeon River. 31. Pronotum dorsal view; Michigan: Otsego Co., West Branch Sturgeon River. Material Examined. Canada , Alberta : Wood Buffalo Co. , McMurray , 1 June 1953 , 2♀ , Exv , S.E. Ball ( CNC ) ; Northwest Territories : Johnny Hoe River , 2 August 1971 , L, J.F. Flanagan ( CNC ) ; Trail River , NWT, 19 September 1971 , L, FWI pipeline project ( CNC ) ; Hearne Channel , Great Slave Lake , 18-20 July 1947 , Exv, W.E . Ricker ( CNC ) ; Source of Mackenzie River , Great Slave Lake, Mackenzie Canada, 31 July 1965 , 2♀ , Exv , W.E. Ricker ( CNC ) ; Quebec : River Malian , 1968, L ( CNC ) ; Lac Aigneau , 4 July 1955 , 7 N, W.E. Ricker ( CNC ) ; USA , Michigan : Benzie Co. , Platte River : Honor at Zimmerman Rd. , N 44.6602 , W 86.0186 , 26 March 2011 , ♀ , Exv, R.E . DeWalt & M. Pessino , reared 17 May 2011 ( INHS ) ; Charlevoix Co. , North Branch Boyne River : 1.4 km N Boyne Falls at US 131, N 45.1802 , W 84.9141 , 25 March 2011 , ♂ , Exv, R.E . DeWalt & M. Pessino , reared 20 April 2011 ( INHS ) ; Jordan’s River , 2 km S East Jordan at Rogers Rd. , N 45.1325 W 85.1240 , 25 March 2011 , ♀ , Exv R.E. DeWalt & M. Pessino , reared 6 May 2011 ( INHS ) ; Mason Co. , Big Sable River , 2 km NNW Free-soil at Custer Rd. , N 44.1897 , W 86.2210 , 26 March 2011 , ♀ , Exv, R.E . DeWalt & M. Pessino ( INHS ) ; Same as previous, ♀ , Exv, R.E . DeWalt & M. Pessino , reared 19 May 2011 ( INHS ) ; Osceola Co. , Pine River , 2.5 km NE Deguts at Norman Rd. , N 44.0634 , W 85.5482 , 26 March 2011 , ♀ , Exv, R.E . DeWalt & M. Pessino , reared 16 May 2011 ( INHS ) ; Same as previous, ♂ , Exv ( INHS ) ; Otsego Co. , West Branch Sturgeon River , 5.5 km NNW Vanderbilt at Thumb Lake Rd. , N 45.1859 W 84.6976 , 25 March 2011 , ♂ , Exv, R.E . DeWalt & M. Pessino , reared 4 May 2011 ( INHS ) ; Minnesota : Cook Co. , Cascade River , 13 km W Grand Marias at CR-45, N 47.74667 , W 90.5255 , 4 March 2012 , ♀ , Exv, R.E . DeWalt & M. Pessino , reared 24 April 2011 , ( INHS ) ; Mississippi : Simpson Co. , Westville Creek , 21 January 1999 , L, B. Stark ( BPSC ) ; Mill Creek , Hwy 472, 16 February 1979 , 2 L, B. Stark ( BPSC ) ; Same data as previous, 25 January 1993 , 2 L, B. Stark ( BPSC ) ; Westville Creek , Pinole , 12 February 1998 , L, J. Wise ( BPSC ) ; New York : Sullivan Co. , Delaware River , Rt. 55, Berryville , Highland , N 41.4764 W 74.9129 , 28 May 2009 , Exv, E . White, P . Novak & G. Kenney ( LCRI ) ; Virginia : Greene Co. , Rapidan River , Ruckersville , 21 March 1940 , ♀ , Exv , Frison , Mohr , & Hawkins ( CNC ) ; Montgomery Co. , Little River , Rt. 787, 8 November 1980 , 6♂ , 4♀ , 6L, 22 Exv, B.C . Kondratieff ( CSUIC ) .