Wormaldia gabriella (Banks)

Muñoz-Quesada, Fernando J. & Holzenthal, Ralph W., 2008, Revision of the Nearctic species of the caddisfly genus Wormaldia McLachlan (Trichoptera: Philopotamidae), Zootaxa 1838, pp. 1-75 : 25-29

Wormaldia gabriella (Banks)

Figures 34–40, 130

Wormaldia gabriella (Banks) 1930: 230 , 231, pl. 12, fig. 14, male, California, USA (CAS) (in Dolophiliella ); Betten 1934: 170 ( Dolophiliella as subgenus of Dolophilus ); Milne 1934 –1936: 82, 83 (as Dolophilus gabriella ); Ross 1938c: 7, 8 (lectotype [MCZ 16326] is male, as Dolophilus gabriella ); Ross 1944: 292 (as Dolophilus gabriella ); Ross 1949: 155, 156 (transferred to Wormaldia ); Ross 1956: 42, 61, 65, fig. 84; Denning 1956a: 79; Denning 1956b: 248, fig. 10: 16C; Denning 1958: 93, figs. 4 A, B; Fischer 1961: 45; Fischer 1971: 190; Nimmo 1974: 316, 330, 333, 334, 336, 337, figs. 679 A–C, 770–779, 783; Schmid 1982: 31–33, 72 (map 15), figs. 146, 148, 149, 156, 157; Schmid 1991: 93; 1998: 45, 215, figs. 111–115; Armitage 1996: [work not paginated].

Ross (1949, 1956) and Armitage (1996) placed this species within the W. moesta Group.

This species is closely related to W. lacerna Denning (1958) and W. moesta ( Banks 1914) . However, W. gabriella can be distinguished from those species in the shapes of tergum VIII, sterna VIII and IX, and the inferior appendage. Tergum VIII in W. gabriella is relatively straight posteriorly. Tergum VIII in W. lacerna has a U-shaped emargination posteromesally; in W. moesta it is slightly sinuous or slightly straight posteromesally. Sternum VIII in W. gabriella has an elongate and triangular process posteromesally. Sternum VIII in W. lacerna is slightly sinuous posteriorly with a convexity mesally; in W. moesta it has an elongate and digitate process posteromesally. Sternum IX in W. gabriella is convexly projected posteriorly with a small and Vshaped emargination mesally. Sternum IX in W. lacerna is weakly projected convexly posteriorly with a shallow concavity mesally; in W. moesta it has a slender and subtriangular process posteromesally. When viewed laterally, the apical segment of the inferior appendage in W. gabriella and W. lacerna is strongly elongate, longer than the basal segment, slightly concave dorsomedially, and with the apex extended and slightly projected posterodorsally. The apical segment of the inferior appendage in W. moesta is elongate, equal in length to the basal segment, straight medially, and the apex is narrowest and truncately rounded.

Adult. Length of male forewing 6–8 mm (holotype: 7 mm). Head brown, with yellowish setae. Antenna long, slender, yellowish with small, brown and yellowish rings of small setae. Maxillary palps yellowish, with lighter setae. Labial palps yellowish, with lighter setae. Dorsum of thorax brown. Legs yellowish, with small, lighter setae. Forewing yellowish, covered with fine, small, brown setae, with apical forks II, III, IV, and V present ( Fig. 39; Schmid 1982: fig. 146, 1998: fig. 111). Hind wing translucent, with very few fine, small, brown setae, with apical forks II, III, and V present ( Fig. 40; Schmid 1982: fig. 146, 1998: fig. 111).

Male genitalia ( Figs. 34–38). Sternum VII with prominent, digitate posteromesal process strongly elongate, equal in length to sternum VIII, widely rounded apically. Tergum VIII relatively straight posteriorly. Sternum VIII with elongate, triangular, posteromesal process, about 0.3 times length of posteromesal process of sternum VII. Segment IX, when viewed dorsally, weakly concave anteriorly; when viewed laterally, nearly C-shaped in appearance, convex anteriorly, concave posteriorly; when viewed ventrally, concave anteriorly, convexly projected posteriorly with small and acute emargination mesally. Segment X, when viewed dorsally, triangularly elongate, slightly concave anteromedially, bulged preapically, narrowly rounded apically, with minute and knob-shaped projection apicomesally; when viewed laterally, slender, very slightly upcurved and produced apicodorsally. Superior appendages digitate; when viewed dorsally, parallel with segment X, stout, elongate, narrowly rounded apically; when viewed laterally, slender, tubularly elongate, nearly equal in length to segment X. Inferior appendages two segmented; when viewed laterally, basal segment broad, subrectangular, elongate, broadest and convex medially, apical segment, stout, rectangular, strongly elongate, longer (about 1.3 times) and narrower than basal segment, slightly concave and narrowest medially, produced and widely rounded posterodorsally; when viewed dorsally, apical segment subrectangularly elongate, narrowest and subovate posteriorly, with elongate and apicolateral patch of short, thin, black, stout, spine-shaped setae; when viewed ventrally, basal segments paired, united for about their anterior three-fifths, separated posteromesally by a narrow, deep, U-shaped emargination, each basal segment stout, broadest medially, with outer margin convexly curved anteromedially, apical segment as when viewed dorsally. Phallus, when viewed laterally, pistol-shaped, widest basally, tapering from middle to apex, membranous apically, very lightly sclerotized, with two visible, internal sclerites ( Fig. 38).

Material examined. CANADA: British Colombia: Cultus Lake , 24.vi.1932, W.E. Ricker, 1 male ( INHS) ; same except, 7.vii.1932, S. Ck. & W.E. Ricker, 4 males (in alcohol, INHS) ; 30.vii.1932, W.E. Ricker, 1 male ( INHS) ; same except, 11.ix.1933, 1 male ( INHS) ; 18.ix.1933, 1 male ( INHS) ; 18.ix.1933, 6 males, 10 females ( INHS) ; 21.ix.1933, 1 male ( INHS) ; 29.ix.1933, 7 males, 6 females ( INHS) ; 30.x.1933, 1 male, 1 female ( INHS) ; 5.xi.1933, 1 male ( INHS) ; 8.xi.1933, 3 males, 2 females ( INHS) ; 12.x.1936. 4 males, 11 females ( INHS) ; 22.x.1936, 1 male ( INHS) ; 1.xi.1936, 3 males ( INHS) ; 23.vii.1936, H.H. Ross, 1 male (in alcohol, INHS) ; Oliver , 11.ix.1923, C.B. Garret, 2 males ( INHS) ; same except, 12.ix.1923, 3 males (1 in CNC, 2 in INHS) ; 23.ix.1923, 3 males (2 in CNC, 1 INHS) ; Vedder Crossing , 28.ix.1937, W.E. Ricker, 1 male, 1 female (in alcohol, INHS) ; Vancouver, Beaver Creek , 30.vi.1940, J.A. & H.H. Ross, 3 males, 7 females (in alcohol, INHS) ; S. Vancouver Is., 26.ix.1950. R. Guppy, 1 male ( CNC) ; North of Haney , 12.viii.1946, E.T. Calvert, 1 male (in alcohol, INHS) ; Manitoba: Herchmer , 1.viii.1937, D.G. Denning, 1 male ( UMSP) . USA: California: small Creek nr. Flats Reservoir on King's Rd. , 14.ii.1958, W.E. Ricker, 4 males, 1 female (in alcohol, INHS) ; Kern Co.: Kern River, Power House # 3, 25.ix.1940, Kaloostain & Simmons, 3 males, 4 females (in alcohol, INHS) ; Kern River at Kernville , 13.ii.1958, W.E. Ricker, 5 males (in alcohol, INHS) ; Lake Co.: Trib. E. Fork middle Creek , 7 mi [= 11.2 km] N of Upper Lake [~ 39º 10’ N, 122º 55’ W], 3.vi.1975, P.A. Peterson (in alcohol, CAS) ; Los Angeles Co.: Los Angeles National Forest, San Gabriel Canyon , Cold Brook at Camp Ground , 12.ii.1958, W.E. Ricker, 1 male, 1 female (in alcohol, INHS) ; Lectotype: Male, Mts. San Gabriel , 29.vi.(?) (in MCZ, # 16326) ; Paratypes: 4 Males, Mts. San Gabriel, 29.vi.(?) (3 males in MCZ, Paratype Types # 16326; 1 male in INHS, Paratype # 16326, INHS-Type # 16290) ; same except, Switzers Camp , 1 male (in MCZ, Type # 16326) ; Marin Co.: Sam P. Taylor State Park , Paper Mill Creek , 19.x.1976, L.D. Unzicker, V. Resh & D.G. Denning, 1 male (in alcohol, INHS) ; Mendocino Co.: South Fork, Eel River , Hickey Grove State Park , 26.vi.1950, W.E. Ricker, 1 male, 1 female (in alcohol, INHS) ; Mono Co.: Convic Creek , 19.ix.1937, H.J. Rayner, 4 males, 5 females (in alcohol, INHS) ; Monterey Co.: Big Sur State Park , 24.vii.1954, W. McDonald, 1 male (in alcohol, CAS) ; Placer Co.: Sout Fork Yuba River , 5 mi [= 8 km] E of Cisco Grove, 11.x.1966, D.G. Denning, 55 males, 18 females (in alcohol, CAS) ; Plumas Co.: Feather Rivet at Chester , 23.viii.1955. W.E. Ricker, 2 males, 1 female (in alcohol, INHS) ; San Luis Obispo Co.: Cuesta Canyon County Park, 11.vi.1975, D.G. Denning, 14 males (in alcohol, INHS) ; Santa Cruz Co.: Sempervirens Creek, Big Basin Redwoods State Park , 5.x.1973, Ross & Ross, 1 male, 1 female (in alcohol, INHS) ; Sonoma Co.: Creek near Colen Ellen , 18.viii.1974, D.G. Denning, 4 males, 2 females (in alcohol, CAS) ; Colorado: N West Creek , 20.viii.1958, Ross & Ross, 1 male (in alcohol, INHS) ; Larimer Co.: Big Thompson Creek along Hwy 34, 6.1 mi [= 11.3 km] NE Estes Park , 40º 24.531’ N, 105º 23.892’ W, 2100 m, 19.viii.1994, Holzenthal & Huisman, 1 male ( UMSP) ; Nevada: Washoe Co.: Verdi, Fish Hatchery , 9.x.1953, C.S. Richards, 105 males, 9 females (in alcohol, INHS) ; Oregon: Benton Co.: Rock Creek, Philomath , 19.x.1934, 3 males ( INHS) ; Clatsop Co.; Vic. Gronnel Rd. , ca. 2 mi [= 3.2 km] E of Elsie, 22–23.vii.1937, S.G. Jewett, Jr. 1 male (in alcohol, INHS) ; Curry Co.: Humbug Mt. State Park , 11.viii.1948, K.M. Fender, 1 male (in alcohol, INHS) ; Klamath Co.: Deer Creek, NE Blg. , 24.ix.1967, J. Schirk, 3 males, 4 females (in alcohol, CAS) ; Lincoln Co.: Yaquina River, Eddyville , 30.ix.1934, R.E. Dimick, 2 males ( INHS) ; Linn Co.: Santiam River, Foster , 14.x.1934, 1 male ( INHS) ; Marion Co.: Stayton , 16.vi.1965, F. Schmid, 3 males, 2 females ( CNC) ; Yamhill Co.: Peavine Ridge, nr. McMinnville , 18.ix.1948, K.M. Fender, 1 male, 1 female (in alcohol, INHS) ; South Dakota: Lawrence Co.: Spearfish , 27.vii.1940, T.H. Jr. & T.H. Frison, 2 males (in alcohol, INHS) ; Black Hills National Forest, Boxelder Creek, 1.8 mi [= 2.8 km] W Nemo , 44º 11.846’ N, 103º 32.024’ W, el. 1470 m, Holzenthal & Huisman, 3 males ( UMSP) ; Utah: Box Elder Co.: Mantua , 4.ix.1943, G.F. Knowlton, 9 males, 1 female (in alcohol, INHS) ; same except, 13.ix.1943, G.F. Knowlton, 6 males (in alcohol, INHS) ; Cache Co.: Logan , 3.ix.1943, G.F. Knowlton, 1 male (in alcohol, INHS) ; same except, 6.xi.1937, 4 males ( INHS) ; Daggett Co.: Ashley National Forest, Sheep Creek on F.R. 221, 40º 53.363’ N, 109º 53.049’ W, el. 2590 m, 27.viii.1994, Holzenthal & Kjer, 11 males, 12 females ( UMSP) ; Utah Co.: Provo River Survey, Vivien Park , 7.viii.1947, A.R. Gaufin, 33 males, 12 females (in alcohol, INHS) ; Weber Co.: Ogden Canyon , 9.x.1939, D.E. Hardy, 1 male (in alcohol, INHS) ; Wasatch Co.: Uintah National Forest, Daniels Creek , Hwy 40 at Center Canyon Rd. , 40º 22.576’ N, 111º 17.602’ W, el. 2040 m, 28.viii,1994, Holzenthal & Kjer, 27 males, 3 females ( UMSP) ; Washington: Whatcom Co.: Belligham, 29.vii.(?), 2 males ( INHS) ; Olson Creek , 27.viii.1971, H.H. Ross, 2 males, 1 female (in alcohol, 2 vials, INHS) ; Wyoming: Park Co.: Yellowstone National Park, Firehole River , North of Faithful Inn , 1.viii.1940, T.H. Jr. & T.H. Frison, 1 male (in alcohol, INHS) ; Teton Co.: Grand Teton National Park, Beaver Creek , 8.viii.1940, T.H. Jr. & T.H. Frison, 48 males, 7 females (in alcohol, 3 vials, INHS) ; same except, 10.viii.1940, 4 males, 1 female (in alcohol, INHS) ; Taggot Creek , 7.viii.1940, 1 male (in alcohol, INHS) .

Distribution. Canada: AB, BC, MB (new record), NT, PQ, YT. USA: CA, CO, ID, MT, NV, OR, SD (new record), UT, WA, WY (new record).