Rhyacopsyche benwa, Wasmund, Anne M. & Holzenthal, Ralph W., 2007

Wasmund, Anne M. & Holzenthal, Ralph W., 2007, A revision of the Neotropical caddisfly genus Rhyacopsyche, with the description of 13 new species (Trichoptera: Hydroptilidae), Zootaxa 1634, pp. 1-59 : 8

Rhyacopsyche benwa , new species

Fig. 7

The dorsolateral lobes closely resemble those of R. hasta, new species, both bearing a group of long, light, ventrally directed setae among several peglike setae. The inferior appendage of R. benwa is unique in its rounded, bifid apex and the presence of a small pointed process along the ventral margin.

Adult (male: n=4). Forewing length 2.9–3.1, 3.0 mm. Color of head dark brown, antennae cream, legs medium brown, wings mottled light and dark brown. Sternum VII with apicomesal point.

Male genitalia. Abdominal segment IX sparsely setose, anterior margin deeply rounded; sternum IX, in lateral view, with posterior margin hooklike; posterior margin nearly straight; dorsolateral lobe of segment IX elongate, in dorsal view slightly truncate, deeply divided, meeting dorsally, apex bearing several short, dark, peglike setae and group of long, light, ventrally directed spines. Tergum X partially retracted inside segment IX, articulating with intermediate appendage. Intermediate appendage produced into small slender plate lying mesad of inferior appendage, in ventral view, plate T-shaped. Inferior appendage elongate, heavily setose, apex bifid with ventral lobe shallowly bifid, apex bearing 2 peglike setae; ventral margin produced into small medial point. Phallus linear, thin membranous sheath surrounding apex; central tubule with small apical hook; apex of lateral process truncate.

Holotype male: PERU: Madre de Dios: Manu, Pakitza , 250 m, 18.ix.1988, Flint & Adams ( UMSP 000115098) ( MHNJP).

Paratypes: BOLIVIA: Dept. La Paz: ANMI Madidi, Chalalan Ecolodge, Raya Mayo river at Wabacuro trail, 14°26’33”S, 067°54’39”W, 351 m, 28.vii.2003, Robertson & Blahnik — 1 male ( UMSP); ECUADOR: Napo: Pano, 580 m, 12.ix.1990, Flint — 1 male ( NMNH); Pastaza: Puyo, 11.v.1977, Spangler & Givens — 1 male ( NMNH).

Distribution. Bolivia, Ecuador, Peru.

Etymology. “ Benwa ” is the nickname of the senior author’s husband, Ben Wasmund.

Figures

FIGURE 7. Rhyacopsyche benwa, new species. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, dorsal.