Nasuconia yasuni sp. nov.

(Figures. 2G, 3G, 4G, 6F, 12E–F)

Diagnosis. (1) Preapical area of posterior pronotal process enlarged with two conical humps; (2) In dorsal view, posterolateral area projected laterally not extended beyond humeral angles; (3) s crossvein present; (4) style with margin dorsoapically acute; (5) pronotum densely pubescent, lacking elevated longitudinal lines or nodes.

Description. Color and sculpture. Head, pronotum, and legs brown, contrasted with scattered punctured yellow areas at pronotal apex. Head, thorax, and abdomen densely pubescent, covered with fine yellow setae; frontoclypeus strongly punctate, corrugated, with transverse and elevated lines. Head. Vertex without longitudinal lines (Fig. 2G). Thorax. Pronotum. In lateral view, depression behind humeral angles weakly marked, preapical part of posterior process with two small conical humps, (Fig. 3G); in dorsal view, humeral angles followed by a gradual constriction, posterolateral area rounded, projected laterally not beyond humeral angles (Fig. 4G).

Forewings. 1 st, 2 nd and 3 rd apical cells with distinctive macula; s crossvein present; two m-cu crossvein, (Fig. 6G).

Abdomen. Male. Aedeagus oblong, compressed in lateral view, gonopore membrane no developed, in posterior view parallel-sided, margin of corona with denticule (Fig. 12E); style in lateral view sinuate, margin dorso-apical of hook acute (Fig. 12F). Female. Unknown.

Measurements (mm). Male. Total length: 4.96; pronotum length: 4.02; pronotum height: 1.07; head width: 1.49; head height: 1.29; distance between apices of humeral angles: 2.52.

Etymology. This species is named after Yasuni National Park in Ecuador where the species was collected; Yasuní was recognized as a Biosphere Reserve by UNESCO in 1989 and is considered one of the areas with the greatest biodiversity per square meter on the planet.

Material examined. Holotype. Pinned. (♀ QCAZ: 273255). Ecuador, Orellana, Reserva Etnica Waorani, 1 Km S. Onkone Gare Camp Transect Ent. 216.3 m. alt. S00°39’25.7” W76°27’10.8”. 7-Oct-1994. T.L Erwin et al. Fogging terre firme forest lot# 896.

Comments: This species can be distinguished from other Nasuconia species by the pronotal vestiture which, in N. yasuni, is densely pubescent, and by the very weak transverse posterior pronotal carina and the pronotal shape.