Soyedina washingtoni (Claassen, 1923)

Vernal Forestfly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:606 8

(Figs. 43–50, 80)

Nemoura washingtoni Claassen 1923:287 . Holotype ♂ (CUIC), Mt. Washington, (Coös Co.), New Hampshire, USA

Nemoura washingtoniana Needham & Claassen, 1925:217 (misspelling)

Nemoura (Soyedina) washingtoni washingtoni Ricker, 1952:53

Soyedina washingtoni Illies, 1966:249

Nemoura (Soyedina) washingtoni Hitchcock, 1974:112

Distribution. Canada: NB. USA: CT, MD, ME, NY, PA, WV (DeWalt et al. 2019).

Material examined. Canada, New Brunswick, Restigouche Co., Robinson Brook, Hwy 17, N Oliver, 16 June 1993, R.W. Baumann & B.C. Kondratieff, 1 male (BYU) ; Victoria Co., spring-fed stream, Hwy 105, S Medford, 16 June 1993, R.W. Baumann, C.R. Nelson & B.C. Kondratieff, 2 males, 1 female (BYU) . USA, Maine, Kennebec Co., Crystal Spring, S Rome, 31 May 1987, R.W. Baumann & G.Z. Jacobi, 4 males, 5 females (BYU) ; Waldo Co, seeps, Webb Road, Thorndike, 3 June 1993, D.S. Potter, 3 males, 1 female (BYU) . Maryland, Garrett Co., tributary to Swamp Run, Savage River State Forest, 39.57996, -79.05999, 3 April 1996, S.A. Grubbs, 1 male (WKUC) ; Mill Run, Savage River State Forest, 39.54291, -79.07903, 28 April 1996, S.A. Grubbs, 5 males, 3 females (WKUC) ; spring into Elk Lick Run, Savage River State Forest, 39.60557, -79.09583, 26 April 1996, S.A. Grubbs, 4 males, 6 females (WKUC) . Pennsylvania, Cambria Co., Otto Run, 24 April 1994, J. Earle, 1 male (JEIC) ; Erie Co., Sixmile Creek, near Wesleyville, 21 April 1979, R.W. Baumann & E.C. Masteller, 1 male (BYU) ; tributary to Fourmile Creek, 10 April 1987, E.C. Masteller, 3 males, 3 females (BYU) ; same but 29 April 1987, E.C. Masteller, 3 males, 12 females (WKUC); McKean Co., tributary Kinzua Creek, Rt 321, 17 April 1979, D.H. Funk, 1 male, 2 females (SWRC) ; Warren Co., concrete wall, Kinzua Dam, 22 April 1979, R.W. Baumann & O.S. Flint, 1 male (BYU) . West Virginia, Pocahontas Co., East Fork Greenbrier River, 38.61778, -79.67674, 26 April 1987, B.C. Kondratieff & R.F. Kirchner, 1 male (BYU) ; Randolph Co., Taylor Run, Alpena Gap Recreation Area, 38.92050, -79.67470, 4 April 1995, S.M. Clark, 3 males, 3 females (BYU) ; Tucker Co., spring, Fernow Experimental Forest, 16 March 1991, M.B. Griffiths, 4 males, 7 females (BYU) .

New province and state records. Canada, Prince Edward Island, Kings Co., Naufrage Springs, near Naufrage River, Hugie Joseph Road, 6 June 1998, C.B. Barr, 2 males (BYU) ; Valleyfield River, Hwy 326, S Montague, 20 June 1993, R.W. Baumann & B.C. Kondratieff, 1 male, 1 female (BYU) . Nova Scotia, Mary Ann Falls, Cape Breton Highlands National Park, 46.72962, -60.36005, 8 June 2009, K. Heard, J. Orlofske, 1 male (INHS, Insect Collection 516240) ; French Lake, Cape Breton Highlands National Park, 46.73057, -60.86532, 10 June 2009, K. Heard, J. Orlofske, 1 male (INHS, Insect Collection 515784) . USA, Massachusetts, Berkshire Co., seep, Wahconah Falls, Wahconah Falls State Park, 27 April 1991, R.W. Baumann & M.F. Whiting, 1 male, 2 females (BYU) . New Hampshire, Coös Co., Cutler Brook, Tuckermans Ravine, Mount Washington, 7 July 1974, S.B. Fiance, 2 males, 9 females & 3 nymphs (BYU) ; Tuckermans Ravine, Mount Washington, 23 June 1941, T.H. Frison & H.H. Ross, 2 males, 2 females (INHS) ; Grafton Co., Hubbard Brook Watershed, West Thornton, 20 May 1975, S.B. Fiance, 5 males, 6 females (BYU) . Vermont, Lamoille Co., West Branch Little River, Hwy 108, near Stowe Ski Area, 6 May 1984, G.R. Fiala, 2 males (BYU) .

Remarks. Adults were described in Claassen (1923) and subsequently in Needham & Claassen (1925, with same image of the male in lateral view; their plate 38, fig. 14). The male paraproct was also illustrated in Hitchcock (1974, his fig. 143). The holotype male and allotype female (Glen House, NH—also in Coös Co.) were collected from different localities. The only other Soyedina species distributed that far northward is S. vallicularia . The combination of the asymmetric dorsal (Figs. 43–45, 48) and ventral sclerites (Figs. 43–44), plus the inner epiproct member that is flanged and directed laterally with the flange lip approximately same width apically (Figs. 44–46), aligns this species closely with S. carolinensis and S. merritti . Soyedina washingtoni is known from the northern Appalachian Mountain region south to West Virginia and westward across Pennsylvania to streams draining into Lake Erie (Fig. 80).