Sierracapnia shepardi (Nelson and Baumann 1987)

(Figs. 17-20)

Sierracapnia shepardi (Nelson and Baumann 1987):495 .

Holotype ♂ (USNM). Type locality: California, Mono Co., Lee Vining Creek, Lee Vining Campground .

Material Examined. USA, California: Inyo Co., Little Cottonwood Creek, 9400’, Sierra Nevada Range, 2-IV-1985, D. Giuliani, 1♀ (BYUC); North Fork Big Pine Creek, 9200’, Sierra Nevada Range, 16-IV-1985, D. Giuliani, 1♂, 1♀ (BYUC); North Fork Big Pine Creek, 8800’, Sierra Nevada Range, 13-IV- 1986, D. Giuliani, 7♂, 5♀ (BYUC); Rock Creek, 10,200’, 13-V-1985, D. Giuliani, 6♂, 11♀ (BYUC) . Mariposa Co., Chilnualna Creek, above Wawona, 18-III-1985, R.W. Baumann & C.R. Nelson, 1♂ (BYUC) . Mono Co., Lee Vining Creek, Lee Vining Campground, 14-III-1985, R. W. Baumann & C.R. Nelson, 16♂, 2♀ (USNM, BYUC); Lee Vining Creek, 7100-7600’, 2-III-1987, D. Giuliani, 74♂, 49♀ (BYUC); Lower Horse Meadow, 1.5 mi S Lee Vining, 7200’, 23-II-1988, D. Giuliani, 17♂, 23♀ (BYUC); Parker Creek, 5.5 mi S Lee Vining, 7200’, 23-II-1988, D. Giuliani, 7♂ (BYUC); Parker Creek, 17-II-1989, D. Giuliani, 39♂, 27♀ (includes 3 mating pairs) (BYUC); North Fork Parker Creek, 6 mi S 1.5 mi W, Lee Vining, 7600’, 23-II-1988, D. Giuliani, 9♂, 23♀ (BYUC); Walker Creek, 4.1 mi S 0.1 mi W Lee Vining, 23-II-1988, D. Giuliani, 26♂, 25♀ (BYUC) . Nevada Co., Donner Creek, W Truckee, 21-II-1985, R.W. Baumann & C.R. Nelson, 1♂ (BYUC); South Fork Yuba River, Soda Springs, 18-III-1984, W.D. Shepard, 15 ♂ (BYUC) . Placer Co., South Fork Yuba River, Hwy 80, Cisco Grove, 8-IV-1978, R.D. Williams, 1♂, 2♀ (BYUC); South Fork Yuba River, Hwy I-80. Cisco Grove, 21-IV-1987, R.W. Baumann, C.R. Nelson & S.A. Wells, 2♂, 1♀ (BYUC) . Sierra Co., North Fork Yuba River, Hwy 49, W Yuba Pass, 29-V-1991, R.W. Baumann & B.P. Stark, 1♀ (BYUC) .

Male. Tergum 7 knob wide and often divided into right and left lobes, knob width 29-32% of segment 7 width (Figs. 17, 19). Epiproct in dorsal view with nearly uniform width along length, maximum width 17-25% of epiproct length; maximum width occurs near mid epiproct; apex broadly rounded and with median posterior-projecting triangular lobe (Fig. 17 and see Fig. 19 in Nelson and Baumann 1987); dorsal membrane dark gray or black, sometimes lighter at tip. Epiproct in lateral view with pronounced reverse (S-shaped) curve, the dorsal surface concave in anterior half and convex in posterior half; ventral surface deeply curved; maximum depth 18-20% of length; maximum depth occurs anterior of mid epiproct; neck narrow (Fig. 18). Epiproct dorsolateral horns closely appressed to main dorsal surface; horn length 14-18% epiproct length; horn tips extend forward to 80-86% of epiproct length (Figs. 18, 20; Table 1).

Female. Subgenital plate heavily sclerotized and dark; plate covers entire width of sternum 8 from its posterior to anterior edge; subgenital plate often with small lateral notches; sclerotization extends onto sternum 7 (Fig. 247, Nelson and Baumann 1989).

Distribution. Sierracapnia shepardi occurs in the central and southern Sierra Nevada, California (Fig. 40).