Comprehensive Description

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Male holotype (Figs 1-3), measurements in mm: TL 1.56; PL 0.60; PW 0.64; EL 0.96; EW 0.64; GD 0.56. Ratios: PL/PW 0.94; EL/EW 1.50; EL/PL 1.60; GD/EW 0.88; TL/EW 2.44. Body elongate, robust; dorsal and ventral surfaces dark brown, almost black; basal antennomeres and funicle, mouthparts and legs mostly yellowish brown; antennal club blackish and terminal palpomere of the maxillary palp yellowish black. Head barely visible from above; dorsal surface subglabrous, sparsely punctate, bearing a transverse impression at disc, preceded by a weak protuberance (seen in the dissected topotype); frontoclypeal ridge produced forward, transversely concave, with anterior margin emarginate at middle forming two subtriangular plates visible from below (Fig. 6), the anterior edge with a row of setae along it. Each eye with a widest diameter of 0.14 mm; some short slender yellowish setae emerging from the intersection between ommatidia. Each antenna with eight antennomeres (FL 0.09, CL 0.17, CL/FL 1.89); length of antennomeres (in mm) as follows (from base to apex): 0.07, 0.05, 0.05, 0.03, 0.02, 0.05, 0.05, 0.07; each antennomere of the club bearing several sparse slender setae, and four conspicuous sensillifers symmetrically positioned at its upper portion. Pronotum with sides reasonably rounded, widest at middle; lateral margins narrow, not visible from above, except for the most posterior corners; anterior edge projected for- and upward, forming a curved raised plate, slightly concave, with a short emargination at apex (Figs 1, 4); disc impressed in the area surrounding pronotal projection; anterolateral angles inconspicuously produced, relatively obtuse; punctation relatively fine, single, uniformly distributed, the posterior half of the median longitudinal surface devoid of punctures; distance between punctures from 1.75 to 2.25 puncture-widths, being greater at the anterior half of pronotum (including pronotal projection); each puncture bearing a fine yellowish decumbent minute seta; in between punctures shiny, microreticulate. Scutellum small, triangular, with few punctures, each one bearing a short, fine, decumbent bristle; basal width 0.11mm and length along the longitudinal midline 0.05 mm. Hind wings developed. Elytra with sides subparallel at the basal two-thirds, then abruptly converging toward apex; punctation single, confused, denser than pronotal punctation; punctures irregular, but ever finer than those on pronotum; vestiture similar to that of pronotum, but in between punctures smooth and shiny. Ventral sclerites microreticulate. Prosternum in front of coxae shallowly concave longitudinally, and a bit transversely convex; surface beside coxae weakly concave; prosternal process laminate, reasonably elevated, almost as long as coxae. Metaventrite moderately convex, bearing sparse slender setae; punctation shallow, consisting mostly of few punctures close to the lateral edges; median suture (discrimen) obscurely indicated posteriorly (see section on “variation”). Abdominal ventrites bearing sparse slender decumbent yellowish setae, longer than those on the dorsal surface; punctation shallow and sparse; lengths of abdominal ventrites (from base to apex, at the longitudinal midline) as follows (in mm): 0.19; 0.08; 0.08; 0.06; 0.06; length of abdominal ventrites together 0.46 mm; abdominal width (basal width of the first abdominal ventrite) 0.63 mm; first abdominal ventrite bearing a broadly transverse margined setose sex patch (Fig. 6, arrow), located postered of center, with a transverse diameter of 0.06 mm. Apex of each protibia expanded; outer apical angle rounded and bearing a row of spines.  Male terminalia. (Figs 7–10) Ninth segment (=genital ring) V-shaped. Fused ninth and tenth tergites (Fig. 10) with posterior margin rounded and bearing small suberect bristles at middle; sides slightly diverging, almost subparallel. Eighth sternite (Fig. 8) with posterior margin shallowly emarginate at middle; posterior angles rounded and bearing some bristles; lateral margins diverging; anterior margin biconcave, rounded and slightly sclerotized at middle but not forming a strut (Fig. 8, arrow). Eighth tergite (Fig. 9) with posterior margin almost straight, bearing long and short bristles along it; lateral margins diverging; anterior margin concave. Aedeagus (Fig. 7) around twice as long as wide; basal piece not observed, possibly membranous. Tegmen slightly longer than and twice as wide as penis; posterior portion subtriangular, then subparallel sided at most of its length, lateral edges slightly curved inward to apex; both sides bearing a small excavation near apex (Fig. 7, arrows). Penis elongate, subcylindrical; sides subparallel at the basal three-fourths, with apical one-fourth subtriangular and weakly sclerotized.  Females. Differing from males in the following features: frontoclypeal ridge rounded, not produced. Lateral margins of pronotum rounded; anterior margin rounded, not produced, bearing small yellowish setae along it; pronotal and elytral punctation slightly finer than in males. Abdominal sex patch absent.


Creative Commons Attribution 3.0 (CC BY 3.0)

© Caio Antunes-Carvalho, Cristiano Lopes-Andrade

Source: ZooKeys

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