Rhyacopsyche colubrinosa, 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 : 11

Rhyacopsyche colubrinosa , new species

Fig. 12

This species is part of the turrialbae species group along with R. turrialbae , R. jimena , and R. mutisi . All species in this group possess a tall dorsal-ventral inferior appendage, a well developed intermediate appendage produced into a pair of processes, and a dorsolateral lobe that is only slightly produced. Rhyacopsyche colubrinosa is most closely related to R. jimena when comparing the structure of the inferior appendage and segment IX, especially the dorsolateral lobes. Rhyacopsyche colubrinosa is diagnosed by its upward curving, twisted intermediate appendage and the presence of a membranous sheath surrounding the phallus.

Adult (male: n=9, female: n=14). Forewing length 3.0–3.7, 3.4 mm (male), 3.0–4.0, 3.3 mm (female). 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 heavily setose, anterior margin deeply rounded; sternum IX, in lateral view, with posterior margin lanceolate; posterior margin slightly undulate; dorsolateral lobe of segment IX slightly produced, in dorsal view rounded, shallowly divided, apex bearing several short, dark, peglike setae and several thin setae. Tergum X partially retracted inside segment IX, articulating with intermediate appendage. Intermediate appendage large, developed into long, dorsally directed, elbowed appendages with the apex lanceolate. Inferior appendage tall, heavily setose, divided into dorsal and ventral lobes, the dorsal lobe inflated along dorsal margin and further divided into a posteriorly directed, rounded, setose lobe and a dorsally directed, truncate lobe, the apex bearing large peglike seta. Phallus base inflated, thin membranous sheath surrounding the middle of the phallus; central tubule with small apical hook; apex of lateral process rounded.

Holotype male: PERU: Cuzco: Paucartambo to Pilcopata Rd. streamlet 50 m E Quiacalzón, 13°01.57’S, 71°29.97’W, 1050 m, 26.vi.1993, R Blahnik & M Pescador ( UMSP 000115097) ( MHNJP).

Paratypes: ECUADOR: Cotopaxi: Latacunga, 133 km W, 2.vii.1975, 1080’, Langley & Cohen — 1 male, 2 females ( NMNH); Pastaza: Puyo, 5.v.1977, #3, P J Spangler & D R Givens — 1 male, 3 females ( NMNH); 10.v.1977, #31, P J Spangler & D R Givens — 1 male, 1 female ( NMNH); 11.v.1977, #36, P J Spangler & D R Givens — 1 male ( UMSP); 13.v.1977, #41, P J Spangler & D R Givens — 1 male, 4 females ( NMNH); 16.v.1977, #51, P J Spangler & D R Givens — 1 male ( NMNH); Pichincha: Río Umachaca, For. Sta. Maquipucuna, 1250 m, 4–5.ix.1990, O S Flint, Jr. — 1 male ( NMNH); Zamora-Chinchipe: 6 km E Zumbi, 980 m, 21.ix.1990, O S Flint, Jr. — 1 male, 4 females ( UMSP).

Distribution. Ecuador, Peru.

Etymology. Colubrinus, Latin for snakelike referring to the form of the intermediate appendage.