Sierracapnia shepardi ( Nelson and Baumann 1987 ), 2015

Bottorff, Richard L. & Baumann, Richard W., 2015, Sierracapnia, A New Genus Of Capniidae (Plecoptera) From Western North America, Illiesia 11 (9), pp. 104-125 : 114-115

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 ).

Figures

Figs. 17-20. Sierracapnia shepardi. Male: 17. Parker Creek, California. Genitalia, dorsal, epiproct and knob on tergum 7. 18. South Fork Yuba River, California. Genitalia, lateral, epiproct and knobs on tergum 9. 19. Parker Creek, California. Knob on tergum 7, dorsolateral. 20. South Fork Yuba River, California. Epiproct, lateral, apex.

Fig. 40. Distributional map of Sierracapnia shepardi.