Trigonopterus minahassae Riedel

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

51. Trigonopterus minahassae Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 51a). Length 2.00 mm. Color of antennae ferruginous; legs and head dark ferruginous; remainder black with weak bronze luster. Body subovate; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median and pair of submedian ridges; intervening furrows with sparse rows of setae; epistome posteriorly with indistinct transverse ridge. Pronotum with disk punctate; median line weakly costate; interspaces between punctures subglabrous, subequal to or smaller than punctures´ diameter. Elytra with striae marked by small punctures; intervals flat, subglabrous; basal margin bordered by transverse row of deeper punctures joining stria 8; along humerus externally bordered by costa. Femora edentate. Metafemur with dorsoposterior edge weakly denticulate; subapically with stridulatory patch. Abdominal ventrites 1-2 impressed, weakly concave, subglabrous; ventrite 5 at middle with shallow pit, subglabrous. Penis (Fig. 51b) with sides of body subparallel, apex subangulate, with sparse setae; apodemes 2.6 × as long as body; transfer apparatus complex, anchor-shaped; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.10-2.28 mm. Female rostrum slender, dorsally subglabrous, sparsely punctate; in basal 1/3 with median and pair of submedian costae; epistome simple.

Material examined.

Holotype (MZB): ARC2791 (GenBank # MK260250), N-Sulawesi Prov., Airmadidi, Gn. Klabat, 01°26.635'N 125°00.823'E, 1031 m, sifted, 16-V-2012. Paratypes (MZB, SMNK): N-Sulawesi Prov.: 7 exx, ARC0319 (GenBank # MK260253), ARC0320 (GenBank # MK260251), ARC0321 (GenBank # MK260254), ARC0322 (GenBank # MK260255), Bitung, Gn. Dua Saudara, 01°29.417'N 125°09.150'E, 907 m, 24-VI-2006; 2 exx, Airmadidi, Gn. Klabat, 01°26.430'N 125°00.622'E, 889 m, sifted, 17-V-2012; 7 exx, ARC2793 (GenBank # MK260252), same data as holotype; 4 exx, Airmadidi, Gn. Klabat, 01°26.505'N 125°00.636'E, 923 m, sifted, 16-V-2012; 6 exx, Airmadidi, Gn. Klabat, 01°26.619'N 125°00.805'E, 1018 m, sifted, 17-V-2012.

Distribution.

N-Sulawesi Prov. (Mt Dua Saudara, Mt Klabat). Elevation 890-1030 m.

Biology.

In leaf litter of montane forest.

Etymology.

This epithet is based on Minahassa region of North Sulawesi. An invariable genitive.

Notes.

Trigonopterus minahassae Riedel, sp. n. was coded as " Trigonopterus sp. 386".