Sierracapnia hornigi ( Baumann and Sheldon 1984 )

Bottorff, Richard L. & Baumann, Richard W., 2015, Sierracapnia, A New Genus Of Capniidae (Plecoptera) From Western North America, Illiesia 11 (9), pp. 104-125 : 110-111

Sierracapnia hornigi ( Baumann and Sheldon 1984)

( Figs. 5-8 )

Sierracapnia hornigi ( Baumann and Sheldon 1984):30 .

Holotype ♂ ( USNM). Type locality: Nevada, Esmeralda Co., Middle Creek, White Mountains .

Material Examined. USA, California: Inyo Co., Cottonwood Creek, White Mountains, 5700’, 30- XII-1985, D. Giuliani, 1♂ ( BYUC) . Mono Co., Millner Creek, White Mountains, 6800’, 21-II-1985, D. Giuliani, 4♂, 11♀ ( BYUC) ; Willow Creek, 10 mi S 6 mi E Benton, 7000’, White Mountains, 5-III- 1986, D. Giuliani, 1 ♀ ( BYUC) . Nevada: Esmeralda Co., Chiatovich Creek, White Mountains, 11-II- 1986, R.W. Baumann & B.J. Sargent, 1♂ ( BYUC) ; Leidy Creek, White Mountains, 7400’, 18-III-1999, A.L. Sheldon, 1♂, 10♀ ( BYUC) ; Middle Creek, White Mountains, 10-II-1977, A.L. Sheldon, 12♂, 41♀ ( BYUC) ; Middle Creek, White Mountains, 4- III-1979, C.E. Hornig, 14♂, 17♀ ( BYUC) ; Middle Creek, mouth of canyon, 11-II-1986, R.W. Baumann & B.J. Sargent, 7♂, 11♀ ( BYUC) .

Male. Tergum 7 knob narrow and slightly notched, knob width 11-16% of segment 7 width ( Fig. 8 ). Epiproct in dorsal view increases in width between neck and anterior half; maximum width 17-24% of epiproct length; maximum width occurs anterior of mid epiproct; apex rounded and with median posterior-projecting triangular lobe; dorsal membrane light colored ( Figs. 5, 7 ). Epiproct in lateral view slightly convex dorsally, deeply keeled ventrally; maximum depth 19-24% of length; maximum depth occurs anterior of mid epiproct; neck narrow ( Fig. 6 ). Epiproct dorsolateral horns closely appressed to main dorsal surface; horn length 15-18% epiproct length; horn tips extend forward to 76-85% epiproct length ( Fig. 7 , Table 1 ).

Female. Subgenital plate heavily sclerotized and dark; plate covers full width of sternum 8 from posterior to anterior edge; posterior of sternum 7 sclerotized (Fig. 224, Nelson and Baumann 1989).

Distribution. Sierracapnia hornigi occurs in the White Mountains of Mono Co., California, and Esmeralda Co., Nevada ( Fig. 39 ).

Figures

Figs. 5-8. Sierracapnia hornigi. Male: Middle Creek, Nevada: 5. Genitalia, dorsal, epiproct and knobs on tergum 9. 6. Genitalia, lateral, epiproct. 7. Epiproct, dorsal. 8. Knob on tergum 7, dorsal, posterior.

Fig. 39. Distributional map of Sierracapnia spp.: barberi (red), hornigi (purple), mono (dark green), palomar (light blue), washoe (yellow), and yosemite (dark blue).