Wormaldia shawnee (Ross)

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: 56-59

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Wormaldia shawnee (Ross)


Wormaldia shawnee (Ross)  

Figures 108–112, 132

Wormaldia shawnee (Ross)   1938a: 133, figs. 52, 53, male, Illinois, USA (INHS) (as Dolophilus   ); Ross 1944: 7, 14, 45, 46, 47, 292, figs. 61, 157, 160, 163, 164, 166 A, B, 169, 170, 173; Ross 1949: 155, 156 (transferred to Wormaldia   ); Ross 1956: 40, 46, 61, 62, fig. 67A; Denning 1956a: 79; Fischer 1961: 55; Fischer 1971: 196; Moulton & Stewart 1996: 182, 183, figs. 511, 512; Armitage 1996: [work not paginated]; Wiggins et al. 2001: 187, 188.

Ross (1949) placed W. shawnee   within subgroup 3 of the W. moesta   Group. In 1956, Ross reordered his former W. moesta   Group proposal and transferred this species to the W. anilla   Group, which was retained by Armitage (1996) (Table 1).

This species and Wormaldia strota ( Ross 1938b)   are similar to W. birneyi   , new species and W. pachita Denning (1956a)   , however the first two species can be separated by the shape of the basal segment of the inferior appendage, as mentioned in the diagnoses of those two last species. Additionally, W. shawnee   is closely related to W. strota   , but they differ in the shapes of sternum VII, segments IX and X, and the inferior appendage. Sternum VII in W. shawnee   has an elongate and triangular process posteromesally. Sternum VII in W. strota   is without a process posteromesally. When viewed laterally, segment IX in W. shawnee   is clearly narrow and nearly C-shaped in appearance. Segment IX in W. strota   is clearly broad and enlarged ventrally, and straight anteriorly. Tergum X in W. shawnee   is triangular, very weakly bulged medially, and rounded apically. Tergum X in W. strota   is triangular, concave laterally, and truncate apically. When viewed laterally, the basal segment of the inferior appendage in W. shawnee   is subrectangular, slightly elongate, clearly convex medially and conspicuously broader than the apical segment. The basal segment in W. strota   is rectangular, strongly elongate, with lateral margins relatively straight medially, and slightly wider than the apical segment.

Adult. Length of male forewing 6–6.5 mm (holotype: 6 mm). Head brown, with lighter 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 light 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. 113; Ross 1944: fig. 163). Hind wing translucent, with very few fine, small, brown setae, with apical forks II, III, and V present ( Fig. 114).

Male genitalia ( Figs. 108–112). Sternum VII with conspicuous, broad, triangular posteromesal process strongly elongate, about 0.5 times length of sternum VIII. Tergum VIII relatively straight posteriorly; when viewed laterally, nearly rectangular. Sternum VIII with slightly convex and posteromesal process, smaller than posteromesal process of sternum VII. Segment IX, when viewed dorsally, weakly concave anteriorly; when viewed laterally, slender and nearly C-shaped in appearance, convex anteriorly, concave posteriorly; when viewed ventrally, weakly concave anteriorly, strongly projected sinuously posteriorly with shallow, mesal concavity. Segment X, when viewed dorsally, triangularly elongate, very weakly bulged medially, narrowest and rounded apically; when viewed laterally, stout, widely rounded apically. Superior appendages digitate; when viewed dorsally, parallel with segment X, stout, elongate, bulged medially, rounded apically; when viewed laterally, slightly shorter than segment X, narrowly rounded apically. Inferior appendages two segmented; when viewed laterally, basal segment thick, subrectangular, slightly elongate, broadest and convex medially; apical segment slender, rectangular, strongly tubularly elongate, longer (about 1.5 times) and narrower than basal segment, rounded and widened posteriorly; when viewed dorsally, apical segment as in ventral view; when viewed ventrally, basal segments pairedunited for about their anterior halves, separated posteromesally by a deep, narrow, U-shaped emargination, each basal segment stout, slightly widest medially, with outer margin slightly convex, apical segment slender, tubularly elongate, weakly incurved and narrowest medially, rounded posterrioly, with slightly elongate and apicolateral patch of short, thin, black, spine-shaped setae on inner margin. Phallus, when viewed laterally, pistol-shaped, widest basally, tapering from middle to apex, membranous apically, very lightly sclerotized, with many visible, small, spine-shaped, internal sclerites ( Fig. 112), surrounded by highly convulated membranes.

Material examined. USA: Connecticut: Tolland Co.: Storrs , 19.vi.1954, J.A. Slater, 1 male (in alcohol, INHS)   ; Illinois: Pope Co.: Bell Smith Springs, nr. McCormick. 25.v.1957, M.W, Sanderson, 1 male (in alcohol, INHS)   ; Lusk Creek, Eddyville , 7.vi.1946, Mohr & Burks, 1 male (in alcohol, INHS)   ; Herod , 29.v.1935, Ross & Mohr, 1 male ( INHS)   ; Holotype: Male, same except, Gibbons Creek , 26.v.1936, Mohr & Burks (in INHS, reared, INHS Type 22262)   ; Paratypes: 2 males, same holotype data (in alcohol, INHS)   ; same except,

27.v.1936, Burks & Mohr, 1 male (in alcohol, INHS)   ; Gibbons Creek , 0.8 mi [= 1.2 km] NW Herod, NE /SW/ SW Sec. 4, T11S R7E   , 3.vi.1986, E.A. Lisowski, 1 male (in alcohol, INHS)   ; New Hampshire: [Strafford Co., (?)]: Lee   , 30.vi.1948, 1 male (in alcohol, INHS)   ; West Virginia: Morgan Co.: Cacapon State Park Lodge   , 17.vi.1967, 2 males, 6 females (in alcohol, INHS)   .

Distribution. USA: AL, CT (new record), IL, KY, MO, NC, NH, OH, PA, SC, TN, VA, WV (new record).


Illinois Natural History Survey














Wormaldia shawnee (Ross)

Muñoz-Quesada, Fernando J. & Holzenthal, Ralph W. 2008

Wormaldia shawnee (Ross)

Wiggins, G. J. & Etnier, D. A. & Grant, J. F. & Lambdin, P. L. & Mayor, A. J. 2001: 187
Moulton, S. R., II. & Stewart, K. W. 1996: 182
Fischer, F. C. J. 1971: 196
Fischer, F. C. J. 1961: 55
Ross, H. H. 1956: 40
Denning, D. G. 1956: 79
Ross, H. H. 1949: 155
Ross, H. H. 1944: 7