Trigonopterus pagaranganensis Riedel

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

59. Trigonopterus pagaranganensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 59a). Length 2.88 mm. Color of antennae and tarsi ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with very weak constriction between pronotum and elytron. Rostrum dorsally with median carina and pair of submedian ridges; intervening furrows with rows of subrecumbent yellowish scales; epistome indistinct, somewhat subglabrous, sparsely setose. Pronotum with disk densely punctate; interspaces between punctures subglabrous, subequal to punctures´ diameter; each puncture with fine, recumbent seta; median line impunctate. Elytra irregularly punctate with small punctures; interspaces subglabrous; some striae marked by fine hairlines. Femora dentate with acute tooth; anterior surface coarsely punctate, each puncture with narrow recumbent scale. Metafemur subapically with stridulatory patch. Metatibia clavate, in apical 1/2 widened, in apical 1/3 ventrally with brush of long setae. Metaventrite medially with short median carina. Abdominal ventrites 1-2 concave, sublaterally covered with erect plumose scales; ventrite 5 at middle with shallow concavity, sublaterally with patches of erect scales. Penis (Fig. 59b) with body differentiated into lateral struts and sinuate inner frame, apex subangulate; apodemes 2.1 × as long as body of penis; transfer apparatus complex; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.74-2.88 mm. Female rostrum dorsally subglabrous, with submedian and sublateral rows of punctures. Female metatibia apically less swollen, without brush of long setae. Female abdominal ventrites 1-2 weakly concave, without erect plumose scales; female abdominal ventrite 5 flat, densely punctate, with scattered minute scales.

Material examined.

Holotype (MZB): ARC3192 (GenBank # MK260414), S-Sulawesi Prov., Selayar Is, Pagarangan, 06°18.334'S 120°30.794'E, 545 m, beaten, 24-IV-2013. Paratypes (MZB, SMNK): S-Sulawesi Prov., Selayar Is: 20 exx, ARC3193 (GenBank # MK260416), ARC3194 (GenBank # MK260413), same data as holotype; 3 exx, ARC3195 (GenBank # MK260415), Bahorea, 06°20.484'S 120°30.127'E, 368 m, beaten 25-IV-2013.

Distribution.

S-Sulawesi Prov. (Selayar Is). Elevation 370-545 m.

Biology.

On foliage in lowland forests.

Etymology.

This epithet is a Latinized adjective based on the type locality.

Notes.

Trigonopterus pagaranganensis Riedel, sp. n. was coded as " Trigonopterus sp. 472".