Wormaldia arizonensis (Ling)

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: 16-19

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Wormaldia arizonensis (Ling)


Wormaldia arizonensis (Ling)  

Figures 14–20, 129

Wormaldia arizonensis (Ling)   1938: 63, male, Arizona, USA (CAS) (as Dolophilus arizonensis   ); Ross 1941a: 51; Ross 1944: 292; Ross 1949: 154–156, pl. 13, figs. 2, 2A (transferred to Wormaldia   ); Ross 1956: 38, 40, 61, 62, figs. 20, 74 A, B; Denning 1956a: 79; Fischer 1961: 46; Fischer 1971: 189; Bueno-Soria & Flint 1978: 194 (distribution); Armitage 1996: [work not paginated].

In 1949, Ross established the W. arizonensis   species Group for a single species, W. arizonensis (Ling)   . Ross (1956) and Armitage (1996) in their species group proposals followed the previous work and retained W. arizonensis   in the W. arizonensis   Group (Table 1).

This species can be easily distinguished from the other Nearctic Wormaldia   by the distinctive shapes of segment X and the superior and inferior appendages. Tergum X has a prominent and inverted “V”-shaped process basally, which is not present in the other Nearctic species; when viewed laterally, the apex of the tergum has a distinctive and prominent ballon-shape. When viewed laterally, the superior appendage is uniquely and strongly convexly extended dorsomedially, the apex reaches the middle of segment X. Finally, when viewed laterally, the apical segment of the inferior appendage is triangular, narrowly rounded apically, and smaller (about 0.7 times) and narrower than the basal segment.

Adult (in alcohol). Length of male forewing 6–7 mm (holotype: 7 mm). Head yellowish, with lighter setae. Antenna long, slender, yellowish, with small, lighter 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, light brown setae, with apical forks I, II, III, IV, and V present ( Fig. 19; Ross 1956: fig. 20). Hind wing translucent, with very few fine, small, brown setae, with apical forks I, II, III, and V present ( Fig. 20; Ross 1956: fig. 20).

Male genitalia ( Figs. 14–18). Sternum VII straight posteriorly without process mesally. Tergum VIII slightly concave anteriorly, slightly sinuous posterolaterally, with two stout, triangular, mesolateral projections followed by a wide, concave, mesal emargintion; when viewed laterally, posterodorsal corner with pointed apex of posterolateral process. Sternum VIII straight posteriorly without process mesally. Segment IX, when viewed dorsally, shallowly concave anteriorly; when viewed laterally, broad, nearly subrectangular in appearance, convexly projected anteriorly, relatively straight posteriorly; when viewed ventrally, concave anteriorly, weakly sinuous posteriorly with shallow mesal concavity. Segment X, when viewed dorsally, stout, subtriangularly elongate, with conspicuous, inverted V-shaped anteromedial process, strongly wide basally, elongate, nearly reaching lower middle of tergum, apex of tergum conspicuous and broadly rounded; when viewed laterally, convexly extended dorsomedially, narrow and upcurved preapically, prominently balloonshaped apically. Superior appendages, when viewed dorsally parallel with segment X, convexly enlarged medially, slightly pointed apically; when viewed laterally, thick, clearly short, reaching middle of segment X, strongly extended convexly dorsomedially, apically slightly pointed. Inferior appendages two segmented; when viewed laterally, basal segment thick, rectangular, elongate, widest and convex medially, apical segment stout, triangular, narrowest and rounded posteriorly, shorter (about 0.7 times) and narrower than basal segment; when viewed dorsally, apical segment subrectangularly elongate, widened and rounded posteriorly, with apical patch of short, black, spine-shaped and peg-shaped setae; when viewed ventrally, basal segments paired, united for about their anterior two-thirds, separated posteromesally by a narrow, deep, U-shaped emargination, each basal segment robust, widest 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 various visible, internal sclerites ( Fig. 18).

Material examined. MEXICO: Durango: 3 mi [= 4.8 km] W of El Salto, 8500 ft [= 2591 m], 19.vi.1964, J.E.H. Martin, 1 male ( CNC); 10 mi [= 16 km] W of El Salto, 9000 ft [= 2744 m], 1.vii.1964, J.E.H. Martin, 1 male ( CNC). USA: Arizona: Holotype: Male, type locality Arizona , (in alcohol, in CAS, Type # 4629); Cochise Co.: Chiricahua Mts. , SW Research Sta., 5400 ft [= 1646 m], swimming pool, 22.vi.1980, V. Roth, 1 male (in alcohol, INHS); same except, 19.viii.1980, L.L. Lampert, 3 males (in alcohol, 2 vials, INHS); Cave Creek , nr. Portal , 9.vi.1961, J. Kingsolver, 3 males, 1 female (in alcohol, INHS); SW Research Station , 7.vii.1965, V. Roth, 37 males, 6 females (in alcohol, CAS); same except, 5–6.viii.1965, 6 males (in alcohol, CAS); 25.viii.1965, 13 males, 1 female (in alcohol, CAS); 1–4.xi.1965, 9 males, 3 females (in alcohol, CAS); 15.xi.1965, 1 male (in alcohol, CAS); 3.5 mi [= 5.6 km] SW of Portal, 5000 ft [= 1524 m], 13.viii.1952, H.B. Leech & J.W. Green, 5 males, 1 female (in alcohol, CAS); 5 mi [= 8 km] W of Portal, 27.viii.1965, V. Roth, 1 male (in alcohol, CAS); same except, 10.ix.1965, 5 males (in alcohol, CAS); 16.ix.1965, 8 males (in alcohol, CAS); Sierra Vista, 1–31.x.1967, R.F. Sternitzky, 2 males, 1 female ( CNC); Coconino Co. : Indian Garden, Oak Creek , 21.vi.1978, M.W. Sanderson, 13 males, 1 female (in alcohol, INHS); Gila Co. : Tonto National Forest , Rd. 708, 2 mi [= 3.2 km] E of Fossil Creek, 27–28.viii.1984, M.W. Sanderson, 2 males (in alcohol, INHS); Gila Co. - Yavapai Co. : Line, Fossil Creek , 30.viii.1986, A.R. Brigham & M.W. Sanderson, 5 males, 7 females (in alcohol, INHS); Yavapai Co. : Beaver Creek at Montezuma Well, 24–25.v.1985, M.W. & W.M. Sanderson, 2 males, 2 females (in alcohol, INHS); same except, below Montezuma Well, 3–4.iv.1985, M.W. Sanderson, 2 males (in alcohol, INHS); below outlet Montezuma Well, 25–26.vii.1985, S. King & M.W. Sanderson, 1 male (in alcohol, INHS); same except, 4–5.xi.1985, M.W. Sanderson, 2 males (in alcohol, INHS); nr. Montezuma Well, 2–3.v.1985, M.W. Sanderson, 2 males, 1 female (in alcohol, INHS); outlet Montezuma Well, 3–4.vi. 1984, M.W. Sanderson, 1 male, 2 females (in alcohol, INHS); Beaver Creek Ejct. [17-179], Rd. 121-618 G, M.W. Sanderson, 2 males, 5 females (in alcohol, INHS); Oak Creek , 76-C-9 (IX), 1 male (in alcohol, INHS); Page Springs, nr. Oak Creek , 14–15.vi.1985, M.W. Sanderson, 1 male (in alcohol, INHS); stream ex. Chas. Ward Ranch, Rd. 618, 19–20.v.1984, M.W. Sanderson, 1 male, 3 females (in alcohol, INHS); West Clear Creek @ Bull Pen Ranch, 9 mi [= 14.4 km] ESE Campe Verde, 3680 ft [= 1122 m], T13N R6E NW/4 NW/4 NW/4 Sec. 11, 27–28.viii.1986, A.R. Brigham, 1 male (in alcohol, INHS); Deception Gulch, SW Jerome, 19.viii.1980, M.W. Sanderson, 1 male (in alcohol, INHS); same except, 23–24.viii.1980, 1 male (in alcohol, INHS); Texas: Culberson Co. : stream in McKittrick Canyon, about 2 mi [= 3.2 km] W of of Information Center in Guadalupe Mts. National Park , nr. Pine Springs, 18.vi.1985, A.R. Brigham & J.L. Brower, 1 male (in alcohol, INHS); same except, McKittrick Creek , McKittrick Canyon, 26.iv.1939, J.A. & H.H. Ross, 1 male (in alcohol, INHS); Frijole Ranch Canyon, nr. Pine Springs, 7.vi.1961, J. Kingsolver, 3 males (in alcohol, INHS); Manzaneta Springs, Frijole, 26.iv.1939, J.A. & H.H. Ross, 1 male (in alcohol, INHS); Utah: Washington Co. : Zion National Park , stream at Weeping Rock, 25–26.vi.1985, M.W. Sanderson, 2 males (in alcohol, INHS).  

Distribution. Mexico: Durango. USA: AZ, TX, UT.


Canadian National Collection of Insects, Arachnids, and Nematodes


California Academy of Sciences


Illinois Natural History Survey














Wormaldia arizonensis (Ling)

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

Wormaldia arizonensis (Ling)

Bueno-Soria, J. & Flint, O. S., Jr. 1978: 194
Fischer, F. C. J. 1971: 189
Fischer, F. C. J. 1961: 46
Ross, H. H. 1956: 38
Denning, D. G. 1956: 79
Ross, H. H. 1949: 154
Ross, H. H. 1944: 292
Ross, H. H. 1941: 51