Triaenodes talamanca, Holzenthal & Contents, 2004

Holzenthal, Ralph W. & Contents, Trond Andersen Table Of, 2004, The caddisfly genus Triaenodes in the Neotropics (Trichoptera: Leptoceridae), Zootaxa 511 (1), pp. 1-80 : 33-34

Triaenodes talamanca , new species

Fig. 25

This species, related to those that lack an apicoventral projection on the inferior appendage, possesses several distinctive features. Its preanal appendages are short, while the dorsomesal process of tergum X is long. Tergum X itself is broadly rounded with the apex slightly excavate medially. Finally, the parameres are subequal and bear microtrichia.

Adult (male: n=1). Forewing length 4.7 mm, hind wing length 3.5 mm. Eye 0.32 mm wide. Antennal scape 0.29 mm long. Maxillary palp segment lengths (in mm): 0.15, 0.26, 0.27, 0.16, 0.32. Forewing pale yellow, denuded.

Male genitalia. Abdominal segment IX anterior margin broadly rounded, produced anteroventrally; pleural region very lightly sclerotized, sparsely setose (or not evident); tergum IX, in dorsal view, with posteromesal margin rounded, with pair of minute dorsomesal papillae; sternum IX in lateral view with posterior margin rounded. Preanal appendage setose, about as long as wide, broad basally, apex rounded. Dorsomesal process of tergum X digitate, originating basally, long, about half length of tergum X, with apical setae; tergum X, in dorsal view, with lateral margins broadly rounded, apex slightly excavate medially; in lateral view, triangular, apex truncate, slightly upturned, apicolateral margins without microtrichia (or not evident). Inferior appendage rounded basally, setose, without apicoventral projection; recurved process gradually downturned, narrow, tapering throughout length, apex attenuate; apicomesal lobe heavily setose, elongate, narrow, slightly broadened subbasally. Phallobase small, triangular, endothecal membranes prominent, highly convoluted, with three parameres, two parameres subequal, gently curved, tapering, with microtrichia, third, long, curved, tapering, without microtrichia; phalicata troughlike, gently curved, widest medially, tapering apically, apex with shallow cleft, phallotremal sclerite not evident.

Holotype male: COSTA RICA: Puntarenas: Río Guineal , ca 1 km (air) E Finca Helechales, 09°04’34”N, 083°05’31”W, 840 m, 4.viii.1987, Holzenthal, Morse & Clausen ( UMSP000027130 ) ( UMSP).

Distribution. Costa Rica.

Etymology. Named for the Cordillera de Talamanca in Costa Rica, where the species was collected.

Figures

FIGURE 25. Triaenodes talamanca, new species. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, lateral.