Triaenodes anomalus Flint, 1967

Holzenthal, Ralph W. & Contents, Trond Andersen Table Of, 2004, The caddisfly genus Triaenodes in the Neotropics (Trichoptera: Leptoceridae), Zootaxa 511 (1), pp. 1-80 : 16-17

Triaenodes anomalus Flint

Fig. 7

Triaenodes anomalus Flint, 1967: 16 [Type locality: Mexico, Guerrero, near Chilpancingo , route 95, km. 297; NMNH; male].

This species is similar to a number of other species, including T. acanthus , T. delicatus , T. hodgesi , T. tico , and especially T. flintorum , all species that have tergum X excavate apically and bearing a digitate dorsomesal process. It differs from T. flintorum and the other species in possessing bifid apicolateral projections on the apex of the phalicata.

Adult (male: n=6, female: n=1, palps broken). Forewing length 6.4–6.6 mm, hind wing length 5.1–5.5, 5.2 mm (male); female wings lost. Eye 0.34–0.42, 0.39 mm wide (male), 0.36 mm wide (female). Antennal scape 0.42–0.49, 0.45 mm long (male), 0.46 mm long (female). Maxillary palp segment lengths (in mm): 0.32–0.34, 0.33; 0.4–0.47, 0.43; 0.52–0.55, 0.53; 0.31–0.32, 0.53–0.56 (male). Forewing light brown, denuded.

Male genitalia. Abdominal segment IX anterior margin nearly straight, slightly produced anteroventrally; pleural region membranous, sparsely setose (or not evident); tergum IX, in dorsal view, with posteromesal margin indistinct, with pair of small dorsomesal papillae; 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 digitate, originating medially, long, extending beyond apex of tergum X, with apical setae; tergum X, in dorsal view, with lateral margins subparallel, apex excavate medially; in lateral view, parallel sided, apex rounded, slightly excavate subapicodorsally, with lateral flange, apicolateral margins with microtrichia. Inferior appendage subquadrangular basally, setose, with long, tapering, apicoventral projection; recurved process abruptly downturned medially, narrow, tapering throughout length, apex attenuate; apicomesal lobe heavily setose, elongate, narrow, angularly broadened medially. Phallobase small, triangular, endothecal membranes prominent, highly convoluted, with pair of parameres, parameres subequal, long, gently curved, tapering; phalicata troughlike, strongly curved, narrow throughout length, apex with deep, narrow cleft, phallotremal sclerite not evident.

Female genitalia. Abdominal segment VIII with sternum setose posteriorly, pleural region highly membranous. Posterior margin tergum IX broadly triangular in dorsal view, with pair of digitate papillose lobes. Valves heavily setose, elliptical. Tergum X setose, triangular in lateral view, ventrolateral margin rounded, apex acute, slightly upturned; in dorsal view uniformly wide, apex truncate. Appendage of segment X setose, narrow basally, elliptical. Structures of internal genitalia as in Figs. 30A, C ; vaginal chamber in ventral view cordate.

Material examined. MEXICO: Guerrero: nr. Chilpancingo, rt. 95, km. 297, 15– 16.vii.1965, Flint & Ortiz — 1 female (paratype), 1 male (holotype) ( UMSP000067438 ) ( NMNH); Michoacán: P. N. Morelia, nr. Morelia , 14.iii.1966, Flint & Ortiz — 1 male ( NMNH). NICARAGUA: Jinotega: Cerro Kilambé , 13°34’00”N, 085°43’00”W, 1520 m, viii.1997, Maes & Hernandez — 1 male ( UMSP); Area Protegida Datanlí­El Diablo, La Quebradona, Río Arriba , 2 kms NE of Santa Maura, 13°10’23”N, 085°51’24”W, 1050 m, 29.vii.2000, Chamorro, Lacayo & Christensen — 1 male ( UMSP) .

Distribution. Mexico, Nicaragua.

Figures

FIGURE 7. Triaenodes anomalus Flint. Male genitalia: A—lateral; B—dorsal; C—ventral; D— phallus, lateral.

FIGURE 30. Triaenodes anomalus Flint. Female genitalia: A—lateral; B—dorsal; C—ventral.