Triaenodes abruptus Flint, 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 : 14-15

Triaenodes abruptus Flint

Fig. 5

Triaenodes abruptus Flint, 1991: 96 [Type locality: Colombia, Dpto Antioquia, Quebrada La Ayura, Envigado (trap B); NMNH; male].

Triaenodes abruptus is a member of the large group of species that possess an apicoventral projection on the inferior appendage, but it is the only species in that group that has a short, conical dorsomesal process of tergum X. It can be further distinguished by the rounded apex of tergum X when viewed dorsally.

Adult. Male (n=1). Forewing length 6.2 mm, hind wing length 5.3 mm. Eye 0.39 mm wide. Antennal scape 0.43 mm long. Maxillary palp segment lengths (in mm): 0.29, 0.35, 0.43, 0.21, 0.45. Forewing pale yellow, denuded.

Male genitalia. Abdominal segment IX anterior margin broadly rounded; pleural region membranous, setose; tergum IX, in dorsal view, with posteromesal margin indistinct, dorsomesal papillae not evident; sternum IX in lateral view with posterior margin sinuate. Preanal appendage setose, about as long as wide, constricted basally, apex subacute. Dorsomesal process of tergum X conical, originating basally, short, with apical setae; tergum X, in dorsal view, with lateral margins broadly rounded, apex rounded; in lateral view, triangular, tapering to apex, apicolateral margins with microtrichia. Inferior appendage subquadrangular basally, setose, with long, tapering, apicoventral projection; recurved process gradually downturned, 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, straight, tapering; phalicata troughlike, gently curved, narrow throughout length, apex mucronate, phallotremal sclerite not evident.

Material examined. COLOMBIA: Antioquia: Mun. Envigado, Quebrada La Ayura , 1750 m, 16.viii.1983, U Matthias — 1 male (paratype, NMNH) .

Distribution. Colombia.

Figures

FIGURE 5. Triaenodes abruptus Flint. Male genitalia: A—lateral; B—dorsal; C—ventral; D— phallus, lateral.