Eurekapnia maculata ( Jewett, 1954 ) Broome & Stark & Baumann, 2019

Broome, Hannah Jean, Stark, Bill P. & Baumann, Richard W., 2019, A Review Of The Genus Bolshecapnia Ricker, 1965 (Plecoptera: Capniidae), And Recognition Of Two New Nearctic Capniid Genera, Illiesia 15 (1), pp. 1-26 : 16-20

Eurekapnia maculata ( Jewett, 1954) , New combination

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org: TaxonName:505895

( Figs. 35-54 )

Capnia maculata Jewett, 1954:174 .

Holotype ♂ (California Academy of Sciences Collection), Marsh Creek , Contra Costa County, California

Capnia (Bolshecapnia) maculata: Ricker, 1965:479

Bolshecapnia maculata: Stewart et al., 1991:202

Distribution. UNITED STATES: CA ( DeWalt et al. 2018).

Material examined. UNITED STATES: California: Alameda Co., Arroyo Mocho, hills behind Livermore , 24 February 1956, 1♂, 1♀ ( USNM). Arroyo Mocho, S of Livermore, 14 March 1957, S.W. Hitchcock, 3♂, 1♀ ( USNM). Arroyo Mocho, 20 miles S of Livermore, 19 March 1985, R.W. Baumann, C.R. Nelson, 2♂, 1♀ ( BYU). Amador Co. , Little Indian Creek , Old Sacramento Road, 3 mi W Plymouth, 16 February 1989, R.L. Bottorff, 2♂, 1♀ ( RLBC). Little Indian Creek , W of Plymouth, 16 February 1989, R.L. Bottorff, 2♂, 1♀ . Butte Co., Campbell Creek, North Table Mountain Ecological Preserve , 2 February 2007, A.B. Richards, J.B. Sandberg, 2♂, 2♀ ( BYU). Campbell Creek and tributary, North Table Mountain Ecological Preserve , 5 mi S Cherokee, 39.59779 N, - 121.54646 W, 2 February 2007, J.B. Sandberg, J.P. Slusark, A.B. Richards, 1♂ ( JBSC). Same site, 1 March 2008, J.B. Sandberg, 1♂, 1♀ ( JBSC). Little Chico Creek . Chico, Hwy 32, 15 February 1985, R.W. Baumann, C.R. Nelson, 1♂, 5♀ ( BYU). Oregon Gulch, Red Bridge, Oregon City, 39.59369 N, - 121.52996 W, 23 February 2008, J.B. Sandberg, D.P. Pickard, 1♂, 1♀ ( JBSC). Colusa Co. , Bear Creek , Bear Valley Road near Hwy 20, 17 February 2012, J.J. Lee, 1♀ ( BYU). Tributary South Fork Stony Creek , Fout Springs Road, 8 February 2016, C.J. Verdone, M. Fairchild, 2♂ ( CSUIC). Contra Costa Co. , Back Creek , 37° 54’ 55.9” N, - 121°55’ 52.9” W, 14 January 2010, L.E. Serpa, 18♂, 3♀ ( LESC). El Dorado Co. , Knickerbocker Creek , 3 mi NW Pilot Hill, 6 February 1988, R.L. Bottorff, 22♂, 8♀ ( RLBC). Ringgold Creek , 3 mi S Placerville, 4 March 1988, R.L. Bottorff, 20♂ ( RLBC). Seep near Martinez Creek , near El Dorado, 16 February 1989, R.L. Bottorff, 2♂, 1♀ ( USNM). Fresno Co. , Mill Creek , 3 miles E Piedra, 20 February 1982, R.F. Gill, 1♀ ( BYU). Watts Creek , 6 mi NW Trimmer, near Pine Flat Lake , 28 November 1981, R.F. Gill, 6♂, 2♀ ( BYU). Lake Co. , small stream parallel to Hwy 53, S jct. with Hwy 20, 22 January 1955, S.W. Hitchcock, 10♂, 1♀ ( USNM). South Fork Scotts Creek , 38° 59’ 24.4” N, - 122° 58’ 4.3” W, 5 March 2012, L.E. Serpa, 1♀ ( LESC). Marin Co. , Potread Meadows, Mount Tamalpais , 2 January 1955, S.W. Hitchcock, 2♂, 5 larvae ( USNM). Mendocino Co. , Long Valley Creek , Hwy 101, S Laytonville, 39.62529 N, - 123.46301 W, 17 January 2011, J. Lee, 3♂, 4♀ ( JJLC). Spring, Upper Burger Creek , Dos Rios Road, 17 January 2011, J. Lee, 22♂, 3♀ ( JJLC, BYU). Napa Co. , Capell Creek , 2.6 mi NW Hwy 128, Hwy 121 junction, 2 February 1993, T. Eichlin, F. Andrews, 2♂ ( BYU). Knoxville Creek , Knoxville-Berryessa Road, 27 January 1992, R.W. Baumann, J. Zenger, 12♂, 5♀ ( BYU). Wragg Creek , Hwy 128, 2 February 1993, T. Eichlin, F. Andrews, 2♂ ( BYU). Wragg Creek , Hwy 128, 0.2 mi E Gordon Valley Road, 38.43090 N, - 122.15925 W, 26 February 2007, J.B. Sandberg, 1♂ ( JBSC). Sacramento Co. , Cosumnes River , Michigan Bar, Ruman Ranch Bridge, 27 January 1982, R.L. Bottorff, 11♂, 3♀ ( RLBC). Cosumnes River , Sloughhouse, 16 January 1983, R.L. Bottorff, 1♂, 1♀ ( RLBC). San Benito Co. , Chalone Creek , Pinnacles National Monument, 25 February 1955, S.W. Hitchcock, 1♂, 2♀ ( USNM). Same site, 25 February 1955, S.W. Hitchcock, 1 ♂ ( CNC). Chalone Creek , W Pinnacles National Monument, 7 January 1983, W.D. Shepard, 10♀ ( CAS). San Luis Obispo Co. , Rocky Creek , Cypress Mountain Road, 22 January 1989, T. Eichlin, F. Andrews, 1♂ ( BYU). Santa Rita Creek , 5.2 mi W Templeton, 22 January 1989, T. Eichlin, F. Andrews, 1♂ ( BYU). Santa Clara Co. , Arroyo Mocho, 20 mi S Livermore at Santa Clara Co. , line, J. Herring, 33♂, 5♀ ( USNM). Coyote Creek , 37° 6’ 7.5” N, - 121° 28’ 21.7” W, 16 February 2010, L.E . Serpa , 3♂, 3♀ ( LESC) . Hunting Hollow Creek , 37° 4’ 30.9” N, - 121° 27’ 44.7” W, 16 February 2010, L.E. Serpa, 9♂, 5♀ ( LESC) . Isabel Creek , 5 km ENE Lick Observatory ( UC Berkeley), San Antonio Valley Rd, 37.3563 N, - 121.5887 W, 19 February 2007, R.E. DeWalt, W.D. Shepard, 23♂ ( INHS) . Jumpoff Creek , 37° 19’ 15.2” N, - 121° 28’ 0.8” W, 18 January 2006, L.E. Serpa, 4♂ reared ( LESC) . Smith Creek , 37°, 19.6’ 1” N, - 121° 39’ 13” W, 7 February 2003, L.E. Serpa, 3♀ ( LESC) . 20 mi S Livermore , March 1956, J. Herring, 2♂ ( USNM) . 1 mi E junction Del Puerto Road and Mines Road, 18 March 1958, S.W. Hitchcock, 1♀ ( USNM) . Solano Co., Cold Creek , Cold Canyon , Hwy 128, 0.8 mi W Winters, 38.50798 N, - 122.097738 W, 28 February 2008, J.B. Sandberg, D.P. Pickard, 1♂ ( BYU) . Cold Creek , Monticello Dam , Stebbins Preserve above Hwy 128, 17 March 1992, A.W. Knight, 6♂, 2♀ ( RLBC) . Sonoma Co., Dry Creek , 38° 20’ 38.3” N, - 122° 35’ 39.7” W, 2 February 1982, L.E. Serpa, 1♂ ( LESC) . Stanislaus Co., Del Puerto Creek , Frank Raines Park, 20 February 1985, R.W. Baumann, C.R. Nelson, 1♂ ( BYU) . Del Puerto Creek , 37° 24’ 42.2” N, - 121° 24’ 42.2” W, 7 April 2008, L.E. Serpa, 1♀ ( LESC) . Orestimba Creek , 37° 17’ 24.7” N, - 121° 11’ 37.1” W, 23 January 2003, L.E. Serpa, 1♂, 2♀ ( LESC) . Tehama Co., Cottonwood Truck Scale , 2 February 1995, R.E. Hill, 1♂ ( BYU) .

Male epiproct (n = 10). Length 569-775 μm, width at midlength 88-100 μm, basal width 128-145 μm. Epiproct elongate, nearly parallel-sided for most of length beyond base. Dorsal sclerite longitudinally divided for entire length by a groove, wide at base and in apical third ( Figs. 37, 39-40 ). Epiproct recurved over abdomen in lateral aspect, its apical third lying between a pair of dorsal tubercles on the anterior margin of tergum 9 ( Fig. 38 ); posterior curved section with a short concave notch in dorsal margin. Epiproct apex may be everted partially (Figs. 43-44), completely ( Figs. 41-42 ), or not at all ( Figs. 37 , 49-53 ), to expose membranous spongy tissue.

Tergal process. (n = 8) A pair of conical processes located on the anteromedian margin of tergum 9, separated by the width of the epiproct ( Figs. 37-38, 40 , 43, 45)).

Vesicle (n = 1). Densely hairy over most of surface, outline almost circular, but with a short anterior pedicel (Figs. 47-48).

Female subgenital plate (n = 2). The plate is apically rounded and projects slightly beyond the posterior margin of sternum 8; lateral margins narrowed basally ( Fig. 35-36 ).

Larva. Undescribed.

Figures

Figs. 31-36. Bolshecapnia spenceri (31-34) and Eurekapnia maculata (35-36) male and female reproductive structures. B. spenceri localities in British Columbia, Consolation Lake., and E. maculata localities in California, Alameda Co., Arroyo Mocho. 31. Male abdominal sternum 9 and vesicle. 32. Male vesicle. 33. Female subgenital plate. 34. Subgenital plate detail. 35. Female abdominal sterna 7-10. 36. Subgenital plate detail (sgp = subgenital plate, ve = vesicle).

Figs. 37-42. Eurekapnia maculata, male reproductive structures. All localities in California, Alameda Co., Arroyo Mocho. 37. Male epiproct and terminal abdominal segments dorsal. 38. Epiproct lateral. 39. Epiproct base dorsal. 40. Epiproct apex unexpanded dorsal. 41. Epiproct, with apex expanded dorsal. 42. Epiproct apex expanded dorsal.

Figs. 49-54. Eurekapnia maculata, variation in male epiprocts. All localities in California. 49. San Benito Co., Chalone Creek male epiproct unexpanded. 50. Sacramento Co., Cosumnes River epiproct partially expanded. 51. Butte Co., Little Chico Creek, epiproct apex slightly expanded. 52. San Luis Obispo Co., Santa Rita Creek, epiproct apex slightly expanded. 53. Napa Co., Wragg Creek epiproct apex unexpanded. 54. Napa Co., Knoxville Creek, exposed fusion plate at epiproct base.