Bolshecapnia milami

Bolshecapnia milami (Nebeker & Gaufin, 1967)

http://lsid.speciesfile.org/urn:lsid: Plecoptera.speciesfile.org: TaxonName:5031

(Figs. 7-24)

Capnia (Bolshecapnia) milamiNebeker & Gaufin, 1967:235. (Holotype ♂), Lion Creek, Seeley Lake area, Lake Co., Montana

Bolshecapnia milami: Baumann et al., 1977:60

Material examined. CANADA: British Columbia: Pine Creek, Halfway Bridge, Spruce Creek Bridge, 59.5915 N, - 133.6177 W, 4 April 2010, S.G. Cannings, 1♀ (RBCM). Pine Creek, Halfway Bridge, upstream, 59.5914 N, - 133.6114 W, 4 April 2010, S.G. Cannings, 16♂, 5♀ (RBCM). Manning Park, Similkameen River, 2 February 1976, S.G. Cannings, 1♂ (UBCZ). Same site, 19 March 1982, S.G. Cannings, 1♀ (UBCZ). Same site, 19 March 1983, S.G. Cannings, 5♀ (UBCZ). Manning Park, Fat Dog Creek, 19 March 1983, S.G. Cannings, 2♀ (UBCZ). Manning Park, Similkameen River at Chuwanten Creek, elevation 4000 ft, S.G. Cannings, 1♂ (UBCZ). Skeena River, 6.5 km W of Kitwanga, 16 March 1990, D. Weir, 2♂ (UBCZ). Tetsa River, 19 June 1958, C.H. Lindroth, 24♀ (USNM). Yukon Territory: Big Creek, 60.158369 N, - 129.704311 W, 783 m, 13 April 2009, P. Maltais, 2♂, 3♀ (RBCM). T r o u t R i v e r, a t A l a s k a H w y, 5 9.3 3 5 8 7 4 N, - 125.93963 W, 14 April 2009, P. Maltais, 1♀ (RBCM). Wheaton River, first bridge, 60.28202 N, - 135.03137 W, 800 m, 11 April 2009, L. Mennell, 3♂, 3♀ (RBCM). Same site, 11 April 2009, S.G. Cannings, 15♂, 12♀ (RBCM). UNITED STATES: Colorado: Chaffee Co., Chalk Creek, Road 162, Agnes Vaille Falls Trailhead, 16 March 2010, R. Durfee, B.C. Kondratieff, 5♂ (BYU). Garfield Co., East Branch Canyon Creek, upper foot bridge, 18 March 1976, D.E. Ruiter, 3♂ (BYU). Pitkin Co., Snowmass Creek, 2-3 miles up Snowmass Creek Road, 25 March 2006, E. Thorp, R. Thorp, 25♂, 8♀ (BYU). Idaho: Blaine Co., Beaver Creek, Hwy 75, 23 April 1985, R.W. Baumann, C. R. Nelson, 1♂ (BYU). Smiley Creek, Hwy 75, Sawtooth City, 23 April 1985, R.W. Baumann, C. R. Nelson, 1♂ (BYU). Montana: Flathead Co., Kootenai Creek, junction Middle Fork Flathead River, 25 March 1966, P. Milam, 8♂, 14♀ (BYU). McDonald Creek, Glacier National Park, along Going-to-the-Sun Road, 48.64620 N, - 113.84633 W, 18 March 1993, J. Giersch. 1♂, 1♀ (USGSAIC). McDonald Creek, second falls above Lake McDonald, Glacier National Park, 48.65550 N, - 113.84069 W, 18 March 1997, J. Giersch, 1♂, 2♀ (USGSAIC). McDonald Creek, Glacier National Park, above McDonald Lake at bridge, 48.63539 N, - 113.86693 W, 18 March 1997, J. Giersch, 3♂ (USGSAIC). Middle Fork Flathead River, 2 mi E Essex, 26 March 1966, P. Milam, 14♂, 18♀ (BYU). Lake Co., Lion Creek, 25 February 1967, P. Milam, 20♂ (BYU). Same site, 16 March 1969, P. Milam, 21♂, 45♀ (BYU). Same site, 21 March 1969, B. R. Oblad, 4♀ (BYU). Same site, 7 March 1970, R.A. Haick, 2♂, 1♀ (BYU). Same site, 7 March 1970, D.S. Potter, 2♂, 1♀ (USNM). Same site, 18 March 1973, R.A. Haick, 3♂, 9♀ (BYU). Lion Creek, Swan Range, 4 April 1970, R.A. Haick, 1♂ (BYU). New Mexico: Taos Co., Rio Hondo above Twining, 26 March 1988, G.Z. Jacobi, 1♂ (GZJC). Oregon: Union Co., Catherine Creek, Hwy 203, above Catherine Creek State Park, 27 February 1984, R.W. Baumann, C. R. Nelson, 1♂ (BYU). Wyoming: Albany Co., Libby Creek, Snowy Range, 2 April 1987, J.C. Burne, 2♂ (BYU).

Male epiproct (n = 6). Length 490-530 μm, width at midlength 137-148 μm, basal width 127 μm. Lateral margins almost parallel, but slightly swollen in areas (Figs. 7, 9, 13-15, 19, 23). Epiproct bearing a pair of short basolateral hooks and an apical, ventrally curved hook (7-8, 10, 15, 16, 21); tips of basolateral hooks extend forward for about 0.5 of the total epiproct length. On the dorsal surface, forward of the basolateral hooks a large area of spongy appearing tissue is located on either side of the well-developed median groove (Figs. 11-12, 17- 18, 21, 24). Median groove extends from the base to an enlarged, subapical orifice (Figs. 7-8, 14).

Tergal process (n = 6). A thimble-shaped process is located in the median field of tergum 9, near the anterior border of the segment (Figs. 9, 12, 18). The anterior hook reaches approximately to, or slightly beyond the tergal process (Figs. 14-15).

Vesicle (n = 1). Length = 275 μm, basal width = 231 μm, median width = 312 μm; outline oval, surface covered with thick setae (Fig. 22).

Female subgenital plate (n = 2). This structure is truncate across the posterior margin, sometimes with the suggestion of one or more small notches; and scarcely reaches beyond the posterior margin of sternum 8 (Fig. 17, see also fig. 172 in Baumann et al. 1977).

Larva. Unknown.