Sierracapnia yosemite (Nelson and Baumann 1987)

(Figs. 34-37)

Sierracapnia yosemite (Nelson and Baumann 1987): 491 .

Holotype ♂ (USNM). Type locality: California, Mariposa Co., Big Creek, Summerdale Campground .

Material Examined. USA, California: Mariposa Co., Big Creek, Hwy 41, Summerdale Campground above Fish Camp, 18-III-1985, R.W. Baumann & C.R. Nelson, 28♂, 11♀ (USNM, BYUC) ; Chilnualna Creek, above Wawona, 18-III-1985, R.W. Baumann & C.R. Nelson, 1♂, 2♀ (BYUC) ; creek at south entrance Yosemite National Park, 18-III-1985, R.W. Baumann & C.R. Nelson, 5♂, 3♀ (BYUC) . Tuolumne Co., Middle Fork Tuolumne River, Evergreen Road, 18-III-1985, R.W. Baumann & C.R. Nelson, 31♂, 6♀ (BYUC) ; South Fork Tuolumne River, Evergreen Lodge Road, NW Big Oak Entrance, 18-III-1985, R.W. Baumann & C.R. Nelson, 38♂, 37♀ (BYUC) ; South Fork Tuolumne River, Hwy 120, Smoky Jack Campground, N 37°49’ W 119°43’, 22-VI-2006, R.W. Baumann & B.C. Kondratieff, 1♂ (BYUC) .

Male. Tergum 7 knob tall, thin, and narrowly divided at apex (knob height 30-35% of segment 7 height; knob width 14-15% of segment 7 width) (Figs. 34, 37). Epiproct in dorsal view with uniform width along length, maximum width 18-24% of epiproct length; maximum width occurs anterior of mid epiproct; apex rounded or wedge-shaped, with a long thin posterior-projecting lobe (Fig. 35); dorsal membrane light colored. Epiproct in lateral view with a shallow reverse (S-shaped) curve dorsally and deep curve ventrally; maximum depth 25-30% of length; maximum depth occurs in anterior third of epiproct; apex elongated and raised, with thin median lip that wraps around tip of eversible crest; neck narrow (Figs. 34, 36). Dorsolateral horns arch high above main epiproct body, exposing membrane of eversible crest in lateral view; horn length 18-21% epiproct length; horn tips extend forward to 85-88% of epiproct length (Fig. 36; Table 1).

Female. Subgenital plate heavily sclerotized and dark, plate covers entire width of sternum 8 from its posterior to anterior edge, sclerotization extends onto posterior third of sternum 7 (Fig. 257, Nelson and Baumann 1989).

Distribution. Sierracapnia yosemite inhabits the western slope of central and southern Sierra Nevada near Yosemite National Park in Mariposa and Tuolumne counties, California (Fig. 39).