Bolshecapnia spenceri ( Ricker, 1965 )

Broome, Hannah Jean, Stark, Bill P. & Baumann, Richard W., 2019, A Review Of The Genus Bolshecapnia Ricker, 1965 (Plecoptera: Capniidae), And Recognition Of Two New Nearctic Capniid Genera, Illiesia 15 (1), pp. 1-26 : 11-14

Bolshecapnia spenceri ( Ricker, 1965)

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org: TaxonName:5022

( Figs. 25-34 )

Capnia (Bolshecapnia) spenceri Ricker, 1965:481 .

Holotype ♂ (Canadian National Collection), Consolation Lake, Banff National Park , Alberta Bolshecapnia spenceri: Ricker & Scudder, 1975:338

Distribution. CANADA: AB, BC, UNITED STATES: MT ( DeWalt et al. 2018)

Material examined. CANADA: Alberta: Consolation Lake, near Moraine Lake, Banff National Park, 51.316 N, - 121.77 W, 1 June 1958, W.E. Ricker, Holotype ♂, Allotype ♀, 37 Paratypes ( CNC). Same data, 2♂, 1♀ ( INHS, Paratypes). British Columbia: Headquarters Creek near Sorcerer Glacier, Selkirk Mountains, 14 July 1960, J. Ricker, 3♀ Paratypes ( CNC). NW branch Lyell Creek, Golden, 30 June 1961, J. Ricker, 1♀ Paratype ( CNC). UNITED STATES: Montana: Glacier Co., Iceberg Lake, Glacier National Park, 3 July 1968, S.M. Stauffer, 4♂ ( USNM). Same site, 5 July 1981, Levine, Weber, 7♂, 2♀ ( FLBS). Same site, 5 July 1981, W.D. Shepard, 26♂, 1♀, 2 larvae ( CAS). Same site, 17 July 1971, G.G. Lawley, 1♂ ( BYU). Same site, 20 July 1966, P. Milam, 11♂ ( FLBS). Same site, 21 July 1979, B. Stark, K.W. Stewart, R.W. Baumann, 97♂, 48♀, 32 larvae (BPSC, BYU). Same site, 24 July 1964, D. C. Lowrie, 18♂, 2♀ ( BYU). Same site, 28 July 1970, R.A. Haick, 1♂, 1♀ ( BYU). Same site, 29 July 1969, R.A. Haick, 94♂, 20♀ ( BYU, USNM). Same site 29 July 1970, R.A. Haick. 2♂, 2♀ ( USNM). Same site, 5 August 1972, R.A. Haick, 87♂, 22♀ ( USNM). Iceberg Lake, above trail to lower lake, 48.81944 N, - 113.76401 W, 15 July 2013, J. Giersch, 1♀ (USGSAIC). Iceberg Creek, below Iceberg Lake, Glacier National Park, 28 July 1964, A. R. Gaufin, 1♀ ( BYU). Same site, 48.82098 N, - 113.73896 W, 14 July 2014, J. Giersch, 3♀ (USGSAIC). Iceberg Lake, Glacier National Park, 5 mi NW Many Glacier Hotel, 28 July 1964, A. R. Gaufin, A.V. Nebeker, 36♂, 6♀ ( CNC). Iceberg Lake, Glacier National Park, Many Glacier Campground Area, 29 July 1969, A. R. Gaufin, 91♂, 20♀ ( BYU). Sue Lake, east shore, Glacier National Park, 48.861896 N, - 113.84058 W, 8 August 2012, J. Giersch, 6♀ (USGSAIC). Tarn above Preston Park, Glacier National Park, 48.72157 N, - 113.63796 W, 27 July 1997, J. Giersch, 2♂, 1♀ (USGSAIC). Upper Twin Lakes Basin, Proglacial pond outlet, NW Fusillade Mountain, Glacier National Park, 48.64387 N, - 113.73931 W, 22 September 2015, J. Giersch, 1 larva (USGSAIC).

Male epiproct (n = 6). Length 524-543 μm, width at midlength 224-250 μm, greatest width near base 295-300 μm. Sclerotized hooks arise subapically from either side of the median groove, and are bent sharply laterad, and extend beyond the lateral margins of the epiproct body ( Figs. 25-29 ); tips of basolateral hooks extend forward for about 0.75 of the total epiproct length. Median groove wide near apex, narrowing gradually to the widest point near the epiproct base ( Fig. 26 ). Small clumps of spongy appearing tissue located along lateral margins near base of hooks ( Figs. 27-28 ). Base of epiproct body bearing a pair of dorsal ridges separated by terminus of median groove ( Figs. 27, 29 ). Apex with a protruding membranous process ( Figs. 29- 30 ).

Tergal process (n = 3). Absent, but tergum 9 covered with a broad band of short, thick setae ( Figs. 27-28 ).

Vesicle (n = 1). Length = 219 μm, basal width =. 214 μm, median width = 252 μm. Process relatively wide, slightly wider near midlength ( Fig. 31-32 ). Ventral surface covered with thick setae.

Female subgenital plate (n = 3). This structure is an apically narrowed, tongue-shaped process, about twice as wide at midlength as near the apical margin ( Figs. 33-34 ); the structure extends beyond the anterior margin of sternum 9 (see fig. 169 in Baumann et al. 1977), and is hairless except for a few scattered long setae on the basal half. Several variations in the structure are shown in figs. 15-16 ( Ricker 1965).

Larva. Described by Stewart & Stark (1988, 2002) and Stewart & Oswood (2006). The larval characteristics listed above for the genus are based on these descriptions.

Figures

Figs. 25-30. Bolshecapnia spenceri, male reproductive structures. All localities in Montana, Glacier Co., Iceberg Lake. 25. Male epiproct and terminal abdominal segments dorsal. 26. Epiproct dorsal. 27. Epiproct dorsal. 28. Epiproct apex dorsal. 29. Epiproct lateral. 30. Epiproct apex lateral.

Figs. 31-36. Bolshecapnia spenceri (31-34) and Eurekapnia maculata (35-36) male and female reproductive structures. B. spenceri localities in British Columbia, Consolation Lake., and E. maculata localities in California, Alameda Co., Arroyo Mocho. 31. Male abdominal sternum 9 and vesicle. 32. Male vesicle. 33. Female subgenital plate. 34. Subgenital plate detail. 35. Female abdominal sterna 7-10. 36. Subgenital plate detail (sgp = subgenital plate, ve = vesicle).