Sierracapnia barberi (Claassen 1924)

Bottorff, Richard L. & Baumann, Richard W., 2015, Sierracapnia, A New Genus Of Capniidae (Plecoptera) From Western North America, Illiesia 11 (9), pp. 104-125 : 108-110

Sierracapnia barberi (Claassen 1924)

( Figs. 1-4 )

Sierracapnia barberi (Claassen 1924) :55.

Holotype ♂ (USNM). Type locality: California, Plumas Co., Feather River Canyon, near Caribou .

Material Examined. USA, California: Alpine Co., West Fork Carson River , 2 mi W Woodfords, 4-IV-1985, D. Giuliani, 5♂, 16♀ ( BYUC) ; Hot Springs Creek, near Grover Hot Springs , N 38.69879° W 119.84299°, 5878’, 2-III-2001, R.L. Bottorff, 3♂, 6♀ ( RLBC) ; Markleeville Creek, Hwy 89, Markleeville , 21-III-1985, R. W. Baumann & C. R. Nelson, 11♂, 10♀ ( BYUC) . El Dorado Co., South Fork American River, Hwy 50, Riverton , 21-III- 1985, R.W. Baumann & C.R. Nelson, 13♂, 7♀ ( BYUC) ; North Fork Cosumnes River, Capps Crossing , N 38.65045  W 120.40741 , 5044’, 5-IV- 1981, R.L. Bottorff, 26♂, 53♀ ( RLBC) ; North Fork Cosumnes River, Capps Crossing , Grizzly Flats , N 38.65045  W 120.40741 , 5044’, 24-III-1982, R.L. Bottorff, 6♂, 9♀ ( BYUC) ; North Fork Cosumnes River, Meiss Ranch , N 38.63579  W 120.33655 , 5440’, 5-IV-1981, R.L. Bottorff, 2♂, 14♀ ( RLBC) ; North Fork Cosumnes River, Sciaroni Crossing , N 38.66946  W 120.53347 , 3221’, 21-I-1986, R.L. Bottorff, 7♂, 2♀ ( RLBC) . Nevada Co., Bear River, Hwy 20, near Placer County line , 21-IV-1987, R.W. Baumann, C.R. Nelson & S.A. Wells, 2♂, 7♀ ( BYUC) ; Bear River, Hwy 20, Tahoe National Forest , 29-I-1992, R.W. Baumann, J.T. Zenger & B.C. Kondratieff, 32♂, 31♀ ( BYUC) ; Donner Creek, W Truckee , 21-II-1985, R.W. Baumann & C.R. Nelson, 40♂, 25♀ ( BYUC) ; Sagehen Creek, Sagehen Creek Biological Station , 9-15-III-1965, A. L. Sheldon, 37♂, 29♀ ( BYUC, USNM) ; Truckee River, Truckee , 21-II-1985, R.W. Baumann & C.R. Nelson, 21♂, 8♀ ( BYUC) . Placer Co., Ward Creek, Hwy 89, near Lake Tahoe , 22-II-1985, R.W. Baumann & C.R. Nelson, 15♂, 15♀ ( BYUC) . Plumas Co., Bucks Lake , 17 mi SW Quincy, 29-IV-1950, H.P. Chandler, 3♀ ( BYUC) ; Long Valley Creek, Hwy 70, Cromberg , 14- II-1985, R.W. Baumann & C.R. Nelson, 124♂, 26♀ ( BYUC) . Shasta Co., North Fork Battle Creek, Hwy 44, near Shingletown , 27-I-1985, D.R. Lauck, 5♂, 2♀ ( BYUC) ; Hat Creek, Hwy 44, Old Station , 26-I-1985, D.R. Lauck, 4♂, 8♀ ( BYUC) . Sierra Co., Cold Creek, Hwy 89, Cold Creek Campground , 9- XII-1986, R.W. Baumann, C.R. Nelson, B.C. Kondratieff & S.A. Wells, 111♂, 49♀ ( BYUC) . Tehama Co., North Fork Deer Creek, Hwy 32, 1 mi S junction Hwy 36 , 15-II-1985, R. W. Baumann & C.R. Nelson, 20♂, 35♀ ( BYUC) ; Martin Creek, Hwy 36, Mineral , 15-II-1985, R.W. Baumann & C.R. Nelson, 5♂ ( BYUC) ; Mill Creek, Hwy 36, Childs Meadow , 15-II-1985, R.W. Baumann & C.R. Nelson, 1♂ ( BYUC) . Tuolumne Co., Cow Creek, Hwy 108, 4 mi N Strawberry , 19-III-1985, R.W. Baumann & C.R. Nelson, 78♂, 24♀ ( BYUC) ; Herring Creek, near Strawberry , 19-III-1985, R.W. Baumann & C.R. Nelson, 140♂, 38♀ ( BYUC) ; South Fork Stanislaus River, Hwy 108, Strawberry , 19-III-1985, R.W, Baumann & C.R. Nelson, 10♂, 9♀ ( BYUC) ; North Fork Tuolumne River, Pinecrest , 19-III-1985, R.W. Baumann & C.R. Nelson, 46♂, 27♀ ( BYUC) . Nevada: Douglas Co., Sierra Canyon Creek , 1 mi N Genoa, N 39.01687° W 119.84985°, 5163’, 26-I-2013, R.L. Bottorff, 38♂, 7♀ ( BYUC, RLBC) . Washoe Co., Dog Creek, Verdi , 22-II-1985, R.W. Baumann & C.R. Nelson, 64♂, 46♀ ( BYUC) ; Galena Creek, Hwy 431, Galena Creek Park , 22-III-1985, R.W. Baumann & C.R. Nelson, 5♂ ( BYUC) ; Galena Creek, Hwy 431, above Reno , 21-IV-1987, R.W. Baumann, C.R. Nelson & S.A. Wells, 1♀ ( BYUC) .

Male. Tergum 7 knob narrow and unnotched (knob height 20-25% of segment 7 height; knob width 9-13% of segment 7 width) ( Figs. 2, 3 ). Epiproct in dorsal view narrow, lateral margins sinuous ( Fig. 1 ); maximum width 15-21% of epiproct length; apex acutely pointed; posterior third of epiproct with narrow ventrolateral flange; dorsal membrane light colored. Epiproct in lateral view slightly convex dorsally, deeply keeled ventrally; maximum depth 30-35% of length; maximum depth near middle of epiproct; basal neck narrow ( Fig. 2 ). Epiproct dorsolateral horns arch above main dorsal surface; horn length 22- 25% epiproct length; horn tips extend forward to 70-78% epiproct length ( Fig. 2 , Table 1 ).

Female. Subgenital plate heavily sclerotized and dark, covering entire width of sternum 8 and posterior portion of sternum 7 (Fig. 211, Nelson and Baumann 1989).

Distribution. Sierracapnia barberi occurs in a northsouth band of northern California and Nevada, including the Cascade Mountains in Shasta County, the Mount Lassen area, northern and central Sierra Nevada, and Carson Range near Lake Tahoe ( Fig. 39 ).

Figures

Fig. 1-4. Sierracapnia barberi. Male: 1. North Fork Cosumnes River, California. Genitalia, dorsal, epiproct. 2. North Fork Cosumnes River, California. Genitalia, lateral, epiproct and knob on tergum 7. 3. Sierra Canyon Creek, Nevada. Knob on tergum 7, dorsal, anterior. 4. Sierra Canyon Creek, Nevada. Tip of paraprocts and fusion plate (center prong), ventral, terminal.

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