Trigonopterus obelix Riedel

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

56. Trigonopterus obelix Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 56a). Length 2.65 mm. Color of antennae ferruginous; legs dark ferruginous; remainder black. Body broadly subovate; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median and pair of submedian carinae; intervening furrows each with row of erect scales; epistome with one median denticle and two pairs of submedian / sublateral denticles. Pronotum with disk densely punctate with coarse, almost confluent punctures; each puncture containing a single seta; narrow interspaces subglabrous; medially with indistinct costa. Elytra densely irregularly punctate with small punctures; striae indistinct; interspaces between punctures subglabrous; striae 7-9 with larger punctures; stria 8 along humerus with 5 large, coarse punctures. Femora edentate; anterior surface densely coarsely punctate, each puncture with suberect scale. Metafemur with dorsoposterior edge denticulate; subapically with stridulatory patch. Posterior face of metatibia in apical 1/2 with dense yellowish setae. Abdominal ventrites 1-2 concave, subglabrous, microreticulate, with sparse coarse punctures, sublaterally each with blunt tooth; in profile ventrite 2 subangularly projecting; ventrite 5 with median impression bordered by submedian carinae; medially punctate, interspaces subglabrous. Penis (Fig. 56b) with sides of body subparallel; apex subangulate medially rounded, without setae; apodemes 2.9 × as long as body; transfer apparatus complex, symmetrical; ductus ejaculatorius extremely long, with distinct bulbus. Intraspecific variation. Length 2.48-2.75 mm. Female rostrum slender, dorsally in apical 1/2 subglabrous, with submedian row of punctures and sublateral pair of furrows; in basal 1/2 with median and pair of submedian glabrous costae; epistome simple. Female abdominal ventrite 5 flat.

Material examined.

Holotype (MZB): ARC2817 (GenBank # MK260203), S-Sulawesi Prov., Pc. Palopo, Gn. Sampuna, 02°56.539'S 120°05.320'E to 02°56.545'S 120°05.595'E, 1038-1101 m, beaten, 29-V-2012. Paratypes (MZB, SMNK, ZSM): S-Sulawesi Prov., Pc. Palopo, Gn. Sampuna: 46 exx, ARC2818 (GenBank # MK260202), ARC2819 (EMBL # LN884932), same data as holotype; 18 exx, Pc. Palopo, Gn. Sampuna, 02°56.539'S 120°05.320'E, 1038 m, sifted, 29-V-2012; 15 exx, 02°56.539'S 120°05.320'E to 02°56.545'S 120°05.595'E, 1038-1101 m, beaten, 02-V-2013; 11 exx, ARC2840 (GenBank # MK260201), ARC2841 (GenBank # MK260200), 02°56.545'S 120°05.595'E, 1101 m, sifted, 29-V-2012; 23 exx, 02°56.545'S 120°05.595'E, 1101 m, sifted, 02-V-2013.

Distribution.

S-Sulawesi Prov. (Pc. Palopo). Elevation 1040-1100 m.

Biology.

On foliage in montane forests, but also in leaf litter.

Etymology.

This epithet is based on a character of the French Asterix comics. It is a noun in apposition.

Notes.

Trigonopterus obelix Riedel, sp. n. was coded as " Trigonopterus sp. 376". This species is closely related to T. posoensis Riedel, sp. n., from which it differs by ca. 15.0-15.5% p-distance of cox1, and by the rounded profile of abdominal ventrite 2.