Rhyacopsyche torulosa 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 : 20-21

Rhyacopsyche torulosa Flint

Fig. 28

Rhyacopsyche torulosa Flint, 1971:521 [Type locality: Guatemala, Escuintla, Rio Metapa, 10 km SE Escuintla; NMNH; male; female]. — Holzenthal, 1988:63 [distribution].

Rhyacopsyche torulosa most closely resembles R. peruviana . This species can be diagnosed by the small medially directed lobe of the dorsolateral lobe and the apices of the inferior appendages which virtually meet along the median line.

Adult (male n=10, female n=10). Forewing length 2.6–2.9, 2.8 mm (male), 2.8–3.4, 3.2 mm (female). Color in alcohol, brown. Sternum VII without apicomesal point.

Male genitalia. Abdominal segment IX heavily setose, anterior margin slightly rounded; sternum IX, in lateral view, with posterior margin produced into small rounded process; posterior margin slightly undulate; dorsolateral lobe of segment IX elongate, in dorsal view rounded, deeply divided, nearly meeting dorsally, with small medially directed lobe, apex bearing several short, dark, peglike setae. Tergum X partially retracted inside segment IX, with long basal processes, articulating with intermediate appendage. Intermediate appendage produced into thin ribbonlike filaments. Inferior appendage elongate, heavily setose, apex bifid with ventral lobe bearing 1 small pointed seta. Phallus linear, membranous sheath absent; central tubule with anteriorly directed, apical hook; apex of lateral process lanceolate.

Material examined. COSTA RICA: Alajuela: Río Toro, 3.0 km (road) SW Bajos del Toro, 10°12’14”N, 084°18’58”W, 1530 m, 3–4.ix.1990, Holzenthal, Blahnik & Huisman — 1 male ( UMSP); Cartago: Suiza, 980 m, 5.xii.1998, P A Opler — 1 male ( NMNH); GUATEMALA: Alta Verapaz: Rio Cahabon, Chibite, 3.i.1989, B C Kondratieff — 26 males, 3 females ( NMNH); Rio Metapa: 10 km SE Esquintla, 5– 6.iii. 1970, 275 m, E J Fee — 15 males, 20 females (paratypes, NMNH).

Distribution. Costa Rica, Guatemala.

Figures

FIGURE 28. Rhyacopsyche torulosa Flint. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, dorsal.