Trigonopterus rudis Riedel

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

80. Trigonopterus rudis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 80a). Length 1.76 mm. Color of antennae and legs ferruginous; elytra dorsally and near base ferruginous, remainder dark ferruginous to black. Body subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum dorsally with median ridge and pair of submedian ridges; intervening furrows with coarse punctures containing each one suberect seta; epistome subglabrous. Pronotum with weak subapical constriction; disk densely, coarsely punctate; interspaces between punctures reticulate-rugose. Elytra with striae deeply impressed, intervals dorsally tuberculate-costate, subglabrous; intervals 1, 3, 5, 7 near base more distinctly swollen; punctures each with stout, suberect seta. Femora edentate. Anteroventral ridges simple; anterior surface of femora punctate-rugose. Metafemur subapically with stridulatory patch. Abdominal ventrite 1 weakly concave, with coarse punctures; ventrite 5 at middle with weak depression, coarsely punctate. Penis (Fig. 80b) with sides subparallel, apex subangulate, laterally with sparse setae; apodemes 2.3 × as long as body of penis; transfer apparatus dentiform, directed basad in repose; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 1.76-1.96 mm. Female rostrum slender, dorsally with submedian and sublateral row of coarse punctures; without epistome. Female abdominal ventrite 5 flat, coarsely punctate.

Material examined.

Holotype (MZB): ARC3079 (GenBank # MK260551), S-Sulawesi Prov., Tanah Toraja, Ponding, Baruppu, 02°47.918'S 119°47.408'E, 2233 m, sifted, 04-V-2013. Paratypes (ARC, MZB, SMNK): 3 exx, ARC3078 (GenBank # MK260549), ARC3080 (GenBank # MK260550), same data as holotype; 1 ex, Ponding, Baruppu, 02°48.010'S 119°47.560'E, 2199 m, sifted, 04-V-2013; 2 exx, Tanah Toraja, Pulu Pulu, 1700 m, 13-16-VIII-1990, sifted; 2 exx, Tanah Toraja, Pulu Pulu, 2400 m, 15-16-VIII-1990, sifted.

Distribution.

S-Sulawesi Prov. (Tanah Toraja). Elevation 1700-2400 m.

Biology.

In leaf litter of montane forest.

Etymology.

This epithet is the Latin adjective rudis, -e (coarse, rough) and refers to the species´ sculpture.

Notes.

Trigonopterus rudis Riedel, sp. n. was coded as " Trigonopterus sp. 519".