Atopsyche (Atopsaura) yunguensis, Rueda, Paola A. & Martin, 2006

Rueda, Paola A. & Martin, 2006, Associations, new records, and a new species of Atopsyche from northwestern Argentina and southern Bolivia (Trichoptera: Hydrobiosidae), Zootaxa 1367, pp. 51-62 : 52-56

Atopsyche (Atopsaura) yunguensis , new species

Figs. 1 , 2

Atopsyche yunguensis , new species, is similar to A. lobosa Ross and King (1952) and to A. spinosa Navás (1930) in the shape of the dorsal lobe of the phallotheca. The new species is in the falina group ( Ross & King 1952). A. yunguensis differs from other species in the shape of parapods which are large, broadened at the tip and dorsally curved toward the midline; the apical segment of the inferior appendages, which are curved toward the midline; and the dorsal lobe of the phallotheca, which is bilobed and curved anteriorly.

Larva. Length 14-17 mm. Head ( Figs. 1 A, 1B) yellowish, with dark brown dorsal and ventral area extending laterally in vertical narrow band, with yellowish muscle scars in constant, apparently species specific pattern; dorsally, dark brown area extends anteriorly, to frontoclypeal sutures. Pronotum ( Fig. 1 C) ocher, with black anterolateral external margins bearing short oblique black bar; center of pronotum with colored brown area with pale spots; posterior margin irregular and black. Mesal sclerite of prosternum ( Fig. 1 D) with posterior margin black; 2 smaller anterolateral sclerites with internal margins rounded, bearing posterior long process and short lateral external process. Foreleg ( Fig. 1 E) with femur bearing curved apicoventral extension, anterior margin crenulate, with spine and long upcurved process as long as internal border of claw; tibia with apicoventral lobe bearing long seta and short seta; tarsus with short seta in apicoventral margin, claw with short tooth basally; tibia, tarsus, and claw reduced. Anal proleg ( Fig. 1 F) with lateral sclerite twice as long as wide in lateral view, with apical margin rounded, basal area black with upcurved black band not reaching the apico-dorsal margin; dorsal plate rectangular, bearing 2 long setae; anal claw with ventral sinuous seta and short basal spine.

Pupa. Length 9 mm. Mandibles ( Fig. 1 G) 3 times longer than width of base, bearing large teeth at mid-length, remaining teeth smaller. Dorsal hook plates ( Fig. 1 H) on abdominal segments II to VII; segment III with asymmetric hook plates; segments IV and V with 2 pairs of dorsal hook plates, the posterior ones oval and larger; dorsal hook plates anterior on segments II, III, VI and VII.

Adult male. Length of forewings 8mm. General color brown. Abdominal terga III and IV, with 2 circular concave anterior glands, anterolateral margins enlarged into flattened spatulate processes; sternum V with 2 anterolateral small lobes; sterna VI and VII each with posteromesal process, process on VI with short spine and twice as long as that on VII.

Male genitalia. Segment IX ( Fig. 2 A ix) reduced in lateral view. Segment X ( Fig. 2 A x) typical, broad at base, and narrow at apex. Parapods ( Fig. 2 A par) large, nearly as long as basal segment of inferior appendages, in lateral view, basal and medial regions straight, apical region sharply upcurved bearing ventral process; in dorsal view ( Fig. 2 B par), apex extremely curved inwardly, bearing setae along inner margin. Preanal appendages ( Fig. 2 A pre) rounded, bearing setae. Filipods ( Fig. 2 A fil) as long as the basal segment of inferior appendages, bearing setae, with rounded apex. Basal segment of inferior appendages ( Fig. 2 A bas) straight in lateral view, apex bilobed, curved toward the midline; apical segment of inferior appendages ( Fig. 2 A api) broad basally, apex tapering in lateral view; in dorsal view, ( Fig. 2 C) broad and curved toward the midline. Phallic apparatus ( Figs. 2 D, 2E) with phallotheca rounded basally in lateral and dorsal views; in lateral view apex with pair of upturned, rounded dorsal lobes, ( Fig. 2 E dl) bearing small spines; in dorsal view dorsal lobe ( Fig. 2 D dl) with apical margin curved, with 2 lateral lobes oriented anteriorly and bearing lateral spines; lateral lobes ( Fig. 2 E ll) in lateral view with apex upcurved; in dorsal view ( Fig. 2 D ll) bifurcated, bearing setae along inner margin; aedeagus ( Figs. 2 D ae, 2E ae) slender and upcurved.

Holotype male: ARGENTINA: Salta: Santa Victoria, Lipeo, Río Los Naranjos, 22°25’47” S, 64°44’20” W, 1109 m, 13.xi.2004, Rueda Martín.

Paratypes: ARGENTINA: Salta: Santa Victoria, Lipeo, Río Los Naranjos, 22°25'47"S, 64°44'20"W, 1109 m, 13.xi.2004, Rueda Martín — 5 male adults; Baritú, Río Baritú, 22º29'58"S, 64º45'67"W, 1481 m, 15.xi.2004, Rueda Martín — 5 male adults, 1 male metamorphotype, 3 male pupae, 2 prepupae, 2 larvae; Santa Victoria, Lipeo, Río Lipeo, 1109 m, 13.xi.2004, Rueda Martín — 1 prepupa, 1 female pupa, 3 larvae; Los Toldos, Río Huaico Grande, 22º16'44"S, 64º42'39"W, 1645 m, 11.xi.2004, Rueda Martín — 1 prepupa, 1 female pupa, 10 larvae; Río Huaico Grande, 22º16'44"S, 64º42'39"W, 1770 m, 27.x.1999, Molineri — 2 larvae; Río Vallecito, 27.x.1999, Molineri — 3 larvae; BOLIVIA: Tarija: O`connor: Entre Río Basin, Río Salinas, 21º38'42,5"S, 64º4'8,2"W, 1160 m, 06.x.2004, C. Molineri and V. Manzo — 1 male metamorphotype, 5 prepupae, 5 female pupae, 6 larvae.

Distribution. Northwestern Argentina, Bolivia.

Etymology. yunguensis , from Yungas or Andean Mountain forest where it was collected.

Figures

FIGURE 1. Atopsyche (Atopsaura) yunguensis n. sp., larva and pupa: A — head, lateral view; B — head, dorsal view; C — pronotum, dorsal view; D — prosternum, ventral view; E — anterior leg, lateral view; F — anal proleg, lateral view; G — pupal mandibles, dorsal view; H — hook plates, dorsal view.

FIGURE 2. Atopsyche (Atopsaura) yunguensis n. sp., male: A — male genitalia, lateral view: B — parapods, dorsal view; C — inferior appendages, dorsal view; D — phallotheca, dorsal view; E — phallotheca, lateral view. Abbreviations: ix = segment IX, x = segment X, par = parapods, pre = preanal appendages, fil = filipods, bas = basal segment of inferior appendages, api = apical segment of inferior appendages, dl = dorsal lobe of phallotheca, ll = lateral lobe of phallotheca, ae = aedeagus.