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Holotype, male (Fig. 12a). Length 2.65 mm. Color of antennae, legs, and elytra orange-ferruginous; pterothorax and abdomen dark ferruginous; head and prothorax black. Body subovate; in profile dorsally convex. Rostrum dorsally coarsely punctate; sublaterally with sparse row of piliform scales; epistome short, indistinct. Pronotum with disk densely coarsely punctate; interspaces between punctures reticulate, subglabrous. Elytra with striae marked by rows of small punctures; intervals flat; basal margin bordered by transverse row of deeper punctures; stria 8 along humerus with coarse punctures. Femora edentate. Meso- and metafemur with anteroventral ridge crenate. Metafemur with dorsoposterior edge weakly denticulate; subapically with stridulatory patch. Metaventrite anteriorly at middle with puncture bearing fine pointed brush of setae. Abdominal ventrites 1–2 weakly concave, at middle subglabrous, sublaterally and posteriorly with dense coarse punctures; ventrite 5 flat, coarsely punctate. Penis (Fig. 12b) with sides of body in basal 1/2 diverging, with lateral flanges, subapically converging to subangulate apex, with sparse short setae; apodemes 3.0 × as long as body of penis; transfer apparatus small; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.53–2.65 mm. Female rostrum slender, dorsally subglabrous, with two submedian rows of punctures, with pair of sublateral furrows.
Holotype (MZB): ARC3205 (GenBank # MK260504), S-Sulawesi Prov., Gn. Lompobattang, Malakaji, Parambintolo, 05°23.545'S 119°55.517'E, 1750–1850 m, 27-IV-2013, beaten. Paratype (SMNK): S-Sulawesi Prov.: 1 ex, ARC3197 (EMBL # LN884974), Gn. Lompobattang, Malakaji, Parambintolo, 05°23.545'S 119°55.517'E, 1803 m, sifted, 27-IV-2013.
S-Sulawesi Prov. (Gn. Lompobattang). Elevation ca. 1800 m.
Presumably mostly on foliage in montane forests.
This epithet is a Latinized adjective based on the historical locality of “Bonthain”. “The Peak of Bonthain” is identical with Mt Lompobattang.
Trigonopterus bonthainensis Riedel, sp. n. was coded as “Trigonopterus sp. 500”.
- Riedel, A; Narakusumo, R; 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi ZooKeys, (828): 1-153. doi