Trigonopterus pseudomanadensis Riedel

Riedel, Alexander & Narakusumo, Raden Pramesa, 2019, One hundred and three new species of Trigonopterus weevils from Sulawesi, ZooKeys 828, pp. 1-153 : 1

72. Trigonopterus pseudomanadensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 72a). Length 2.51 mm. Color of antennae and legs ferruginous; remainder black. Body subovate; in profile dorsally convex; with weak constriction between pronotum and elytron. Rostrum dorsally with median and pair of submedian ridges; intervening furrows with sparse rows of suberect setae; epistome swollen, sparsely punctate. Pronotum with disk densely punctate; interspaces between punctures subglabrous, subequal to or smaller than punctures´ diameter; median line weakly costate, impunctate. Elytra with striae marked by rows of small punctures; basal margin weakly costate, bordered by transverse row of deeper punctures; stria 8 and 9 along humerus with large, coarse punctures; sutural interval with additional row of small punctures, other intervals subglabrous, with few interspersed punctures. Femora edentate; anterior surface coarsely punctate, each puncture with recumbent yellowish scale. Metafemur with dorsoposterior edge denticulate; subapically with stridulatory patch. Metatibia with uncus thick, curved ventroposteriad. Abdominal ventrite 1 and anterior portion of ventrite 2 cavernous, subglabrous, microreticulate; ventrite 2 posteriorly forming rim; ventrite 5 in basal 1/2 with weak median ridge and pair of shallow submedian impressions, subapically densely covered with short erect scales. Penis (Fig. 72b) with sides of body subparallel, in apical 1/4 angularly projecting, ventrally converging to acute apex; without setae; apodemes 2.6 × as long as body of penis; transfer apparatus complex; ductus ejaculatorius with indistinct bulbus.

Material examined.

Holotype (MZB): ARC2886 (GenBank # MK260300), N-Sulawesi Prov., Kotamobagu, Matalibaru, 00°32.445'N 124°14.185'E, 956 m, beaten, 20-V-2012.

Distribution.

N-Sulawesi Prov. (Kotamobagu). Elevation ca. 960 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is a combination of the Greek prefix pseudo- (false) and the name of T. manadensis sp. n., a closely related species. A variable adjective.

Notes.

Trigonopterus pseudomanadensis Riedel, sp. n. was coded as " Trigonopterus sp. 399".