Rhyacopsyche bulbosa, 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 : 8-9

Rhyacopsyche bulbosa , new species

Fig. 8

This species is similar to R. dikrosa , new species, and R. hagenii in sharing bifid dorsolateral lobes. It can be distinguished by the 3 large apical setae of the inferior appendage and the absence of a lobe on the posterior margin of segment IX.

Adult (male: n=17, female: n=8). Forewing length 2.8–3.8, 3.1 mm (male), 3.4–3.8, 3.6 mm (female). Color of head dark brown, antennae cream, legs cream, wings mottled medium 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 produced into small rounded process; posterior margin produced into broad spatulate lobe; dorsolateral lobe of segment IX slightly produced, in dorsal view rounded, shallowly divided, nearly meeting dorsally, apex bearing 2 short, dark, peglike setae. Tergum X completely retracted inside segment IX. Intermediate appendage not evident. Inferior appendage elongate, heavily setose, apex clavate, bearing 3 long, light, pointed setae. Phallus linear, thin membranous sheath surrounding virtually the entire phallus, covered with spicules; central tubule with small apical hook; apex of lateral process lanceolate.

Holotype male: BRAZIL: Rio de Janeiro: Nova Friburgo, municipal watersupply, 950 m, 24.iv.1977, C M & O S Flint ( UMSP 000115100) ( MZUSP).

Paratypes: BRAZIL: Minas Gerais: Ibitipoca, sitio of Anestis, Papadopoulos, cachoeira, 21°43’26”S, 043°54’32”W, 1125 m, 4–5.v.1998, Holzenthal & Paprocki — 1 male ( MZUSP); Rio de Janeiro: same data as holotype — 4 females ( NMNH); Parque Nacional Tijuca, Represa dos Ciganos, 7.iv.1977, C M & O S Flint — 1 male, 1 female ( NMNH); Rio Macacú (2nd order), on RJ 116, km 62, 22°23’12”N, 042°33’57”W, 840 m, 17.iii.1996, Holzenthal, Rochetti, Oliveria — 2 males ( UMSP); Parque Nacional da Serra dos Órgãos, Rio Paquequer, 22°27’00”S, 042°59’54”W, 1000 m, 26.ii.2002, Holzenthal, Blahnik, Paprocki, Prather — 2 males, 3 females ( UMSP); São Paulo: Parque Nacional da Serra da Bocaina Cachoeira dos Posses, 22°46’26”S, 044°36’15”W, 1250 m, 3.iii.2002, Holzenthal, Blahnik, Paprocki, Prather — 10 males ( MZUSP).

Distribution. Brazil.

Etymology. Bulbosus, Latin for swollen, referring to the apical swelling of the inferior appendages.

Figures

FIGURE 8. Rhyacopsyche bulbosa, new species. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, dorsal.