Rhyacopsyche peruviana Flint

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 : 18-19

Rhyacopsyche peruviana Flint

Fig. 25

Rhyacopsyche peruviana Flint, 1975:568 [Type locality: South-Peru, Sivia; ZSZMH; male; female].

The species resembles R. obliqua and R. colombiana . It is easily diagnosed by the fused dorsolateral lobes when viewed from the dorsal aspect.

Adult (male n=10, female n=10). Forewing length 2.6–3.0, 2.5 mm (male), 3.2–3.6, 3.4 mm (female). Color of head dark brown, antennae cream, legs cream, 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 slightly rounded, with connecting membrane to inferior appendage; posterior margin slightly inflated midlaterally; dorsolateral lobe of segment IX fused, elongate, in dorsal view truncate, apex bearing several thin setae. Tergum X partially retracted inside segment IX, apex truncate. Intermediate appendage produced into small slender plate lying mesad of inferior appendage, in ventral view, plate spatulate. Inferior appendage broad, elongate, heavily setose, apex bifid with ventral lobe bearing 1 large pointed seta. Phallus linear, thin membranous sheath surrounding apex, covered with spicules; central tubule with rounded apex; apex of lateral process lanceolate.

Material examined. ECUADOR: Pastaza: Puyo, riverside at blacklights, 29.v.1975, Cohen & Langley — 6 males, 5 females ( NMNH); 16 km W, 3.ii.1976, Spangler et al. — 1 male ( NMNH); 3 km W, 15.vii.1976, Jeffrey Cohen — 2 males ( NMNH); 11.v.1977, #36, P J Spangler & D R Givens — 1 male ( NMNH); 1.5 km S, 21.v.1977, P J Spangler & D R Givens — 4 males ( NMNH); 21.v.1977, #67, P J Spangler & D R Givens — 2 males, 1 female ( NMNH); Zamora–Chinchipe: Yanzaza, 15.vi.1976, A Langley et al. — 74 males, 16 females ( NMNH), 20males, 20 females ( UMSP); Yanzaza, 5 km N, 29.xi.1978, Jos. J Anderson — 5 males, 2 females ( UMSP).

Distribution. Ecuador, Peru.

Figures

FIGURE 25. Rhyacopsyche peruviana Flint. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, dorsal.