Rhyacopsyche hagenii Müller

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 : 6-7

Rhyacopsyche hagenii Müller

Fig. 4 , 5

Rhyacopsyche hagenii Müller, 1879b:143 [Type locality: Brazil; type depository unknown; larval and pupal cases]. — Thienemann, 1905:287 [larva, male]. — Möller, 1921:525 [larva]. Ulmer, 1957:172, 187 [literature, key to larval genus]. — Angrisano, 1995:509 [distribution].

This species resembles R. dikrosa , new species, in that they share bifid dorsolateral lobes of segment IX and an inferior appendage with 1 or more strong apical setae. The features of the phallus are also similar, the central tubule with a hooked apex and a membranous sheath densely covered with spicules. It shares the presence of plumose setae with R. colei , new species. The large, truncate, midlateral lobe of segment IX is unique to R. hagenii .

Adult (male: n=62, female: n=39). Forewing length 2.6–3.7, 3.1 mm (male), 2.7–3.7, 3.3 mm (female). Color of head dark brown, antennae cream, legs medium brown, wings mottled medium and dark brown. Sternum VII with apicomesal point.

Male genitalia. Abdominal segment IX heavily setose, bearing several plumose setae, anterior margin slightly rounded; sternum IX, in lateral view, with posterior margin slightly undulate; posterior margin produced into large truncate lobe, apex with several peglike seta; dorsolateral lobe of segment IX elongate, in dorsal view narrowed, deeply divided, widely separated, with small medially directed lobe bearing several long peglike setae, apex bearing 2, 3, or 4 dark peglike setae. Tergum X completely retracted inside segment IX. Intermediate appendage large, undulate. Inferior appendage elongate, heavily setose, apex clavate, bearing large pointed seta. Phallus linear, thin membranous sheath surrounding virtually the entire phallus, covered with spicules; central tubule with large apical hook, apex of lateral process truncate.

Female genitalia. Simple oviscapt. Tergum VIII bearing a setate lobe from posterior margin. Segments VII–IX with long internal rod-like apodemes.

Material examined. ARGENTINA: Misiones: Ao. Saura, 9 km No., L.N. Alem, 20.xi.1973, O S Flint, Jr. — 1 male, 1 female ( NMNH); BRAZIL: Parana: Rio Mãe Catira, 10 km N Porto de Cima, 25°21.821’S, 48°52.473’W, 200 m, 8–9.xii.1997, Holzenthal & Huisman — 14 males, 14 females ( UMSP); Rio Jacareí, ca 5 km S BR 277, 25°33’56”S, 048°42’10”W, 80 m, 9.xi.1997, Holzenthal & Huisman — 1 male, 1 female ( MZUSP); Curitiba, Morretes, 30.viii.2000, W. Mey — 6 males, 2 females ( NMNH); Rio de Janeiro: Rio Macacú (2nd order), on RJ 116, km 62, 22°23’12”N, 042°33’57”W, 840 m, 17.iii.1996, Holzenthal, Rochetti, Oliveira — 2 males ( UMSP); Parque Nacional da Serra dos Órgãos, Guapimirim, Rio Soberbo, 22°29’36”S, 042°59’47”W, 950 m, 28.ii.2002, Holzenthal, Blahnik, Paprocki, Prather — 4 males, 4 females ( MZUSP); Parque Nacional do Itatiaia, Rio Campo Belo, 22°27’02”S, 044°36’49”W, 1300 m, 7.iii.2002, Holzenthal, Blahnik, Paprocki, Prather — 9 males, 9 females ( UMSP); Parque Nacional do Itatiaia, trib. to Rio Taquaral, 22°26’41”S, 044°36’28”W, 1320 m, 6.iii.2002, Holzenthal, Blahnik, Prather — 1 male ( MZUSP); Santa Catarina: Blumenau, Res. Spitzkopf, 4.xii.1975, Exc. Dept. Zool. U.S. P., — 1 male ( MZUSP); Parque Ecológica Spitzkopf, Rio Caeté above 1st falls, 27°00’21”S, 049°06’42”W, 170 m, 4.iii.1998, Holzenthal, Froelich, Paprocki — 18 males, 7 females ( UMSP); Parque Ecológica Spitzkopf, confl. Rio Ouro & Rio Caeté, 27°00.352’S, 49°06.693’W, 140 m, 3.iii.1998, Holzenthal, Froelich, Paprocki — 3 males, 1 female ( MZUSP); Morro de Igreja, Urubici Cachoeira Veu da Noiva, 28°04’36”S, 049°31’05”W, 1300 m, 5.iii.1998, Holzenthal, Froelich, Paprocki — 1 male, 1 female ( UMSP); São Paulo: Est. Biol. Paranapiacaba, #37, 27.xi.1963, Froehlich — 4 males ( MZUSP, NMNH); #42, 27.i.1964, Froehlich — 4 males ( MZUSP, NMNH).

Distribution. Argentina, Brazil, Uruguay.

Figures

FIGURE 4. Rhyacopsyche hagenii Müller. Male genitalia: A—lateral; B—dorsal; C—ventral; D—phallus, dorsal; Eplumose seta.

FIGURE 5. Rhyacopsyche hagenii Müller. Female genitalia: A—ventral; B—dorsal; C—lateral.