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

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Trigonopterus minahassae Riedel

sp. n.

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.


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


In leaf litter of montane forest.


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


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