Triaenodes peruanus Flint & Reyes, 1991

Holzenthal, Ralph W. & Contents, Trond Andersen Table Of, 2004, The caddisfly genus Triaenodes in the Neotropics (Trichoptera: Leptoceridae), Zootaxa 511 (1), pp. 1-80 : 31-32

Triaenodes peruanus Flint & Reyes

Fig. 23 , 35

Triaenodes peruanus Flint & Reyes, 1991: 488 . [Type locality: Peru, Dept. La Libertad, Prov. Trujillo, Dist. Simbal, Rio Lucumar, Simbal ; NMNH; male].

This is another species with a rather generalized morphology within the group of species having an apicoventral projection on the inferior appendage and a digitate dorsomesal process on tergum X. As stated earlier, it is similar to T. delicatus , but can be separated by the more apically rounded apex of tergum X.

Adult (male: n=3, female: n=2). Forewing length 4.2–5.1 mm (male), 4.9–5.3 mm (female); hind wing length 3.4–4.2 mm (male), 4.0– 4.3 mm (female). Eye 0.32 mm wide (male), 0.34–0.35 mm wide (female). Antennal scape 0.40–0.43 mm long (male), 0.39– 0.42 mm long (female). Maxillary palp segment lengths (in mm): 0.29, 0.31, 0.36, 0.20, 0.51 (male); 0.31–0.33, 0.35–0.39, 0.46–0.48, 0.21–0.25, 0.52–0.56 (female). Forewing golden brown, with narrow line of cream colored hairs along anal margin.

Male genitalia. Abdominal segment IX anterior margin slightly rounded, slightly produced anteroventrally; pleural region membranous, setose; tergum IX, in dorsal view, with posteromesal margin indistinct, with pair of minute dorsomesal papillae; sternum IX in lateral view with posterior margin slightly sinuate. Preanal appendage setose, about as long as wide, constricted basally, apex subacute. Dorsomesal process of tergum X digitate, originating basally, long, less than half length of tergum X, with apical setae; tergum X, in dorsal view, with lateral margins subtriangular, apex rounded; in lateral view, triangular, tapering to apex, apicolateral margins with microtrichia. Inferior appendage subquadrangular basally, setose, with short, tapering, apicoventral projection; recurved process abruptly downturned subapically, narrow, tapering throughout length, apex attenuate; apicomesal lobe heavily setose, elongate, narrow, parallel sided. Phallobase small, triangular, endothecal membranes prominent, highly convoluted, with pair of parameres, parameres subequal, long, gently curved, tapering, with small subapical denticle; phalicata troughlike, gently curved, narrow throughout length, apex acute, phallotremal sclerite not evident.

Female genitalia. Abdominal segment VIII with sternum setose posteriorly, pleural region highly membranous. Posterior margin tergum IX rounded in dorsal view, with pair of small papillose lobes. Valves heavily setose, subquadrangular. Tergum X setose, triangular in lateral view, ventrolateral margin rounded, apex acute, slightly upturned; in dorsal view constricted medially, apex rounded. Appendage of segment X setose, broad basally, elliptical. Structures of internal genitalia as in Figs. 35A, C ; vaginal chamber in ventral view circular.

Material examined. COLOMBIA: Antioquia: Queb. Honda, 12 km SW Fredonia , 22.ii.1983, O S Flint — 1 male ( NMNH) . ECUADOR: Pichincha: Río Palenque Biological Station, Río Palenque, Santo Domingo (47 km), 229 m, 29.vii.1976, J Cohen — 1 female, 1 male ( NMNH) . PERU: Trujillo: Río Lucumar­Simbal (Pueblo), 24.vi.1988, Reyes — 1 female, 1 male (paratypes, NMNH) .

Distribution. Colombia, Ecuador, Peru.

Figures

FIGURE 23. Triaenodes peruanus Flint & Reyes. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, lateral.

FIGURE 35. Triaenodes peruanus Flint & Reyes. Female genitalia: A—lateral; B—dorsal; C— ventral.