Trigonopterus bonthainensis Riedel

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

12. Trigonopterus bonthainensis Riedel sp. n.

Diagnostic description.

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.

Material examined.

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.

Distribution.

S-Sulawesi Prov. (Gn. Lompobattang). Elevation ca. 1800 m.

Biology.

Presumably mostly on foliage in montane forests.

Etymology.

This epithet is a Latinized adjective based on the historical locality of “Bonthain”. "The Peak of Bonthain" is identical with Mt Lompobattang.

Notes.

Trigonopterus bonthainensis Riedel, sp. n. was coded as " Trigonopterus sp. 500".