Trigonopterus luwukensis Riedel

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

45. Trigonopterus luwukensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 45a). Length 1.61 mm. Color of antennae light ferruginous; legs and head dark ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with constriction between pronotum and elytron. Rostrum dorsally coarsely punctate-rugose, with median ridge; with sparse rows of suberect setae; epistome indistinct, sparsely punctate. Pronotum with weak subapical constriction; disk coarsely punctate, interspaces reticulate; each puncture with suberect, curved seta. Elytra with striae deeply impressed; each puncture with suberect, curved seta; intervals costate, subglabrous, weakly microreticulate. Meso- and metafemur with small tooth, profemur edentate. Metafemur subapically without stridulatory patch. Abdominal ventrite 5 large, flat, markedly microreticulate. Penis (Fig. 45b) hardly asymmetrical; tip medially weakly extended; basal orifice ventrally simple; apodemes shorter than body of penis (0.6 ×); ductus ejaculatorius with distinct bulbus. Intraspecific variation. Length 1.61-1.82 mm. Female rostrum dorsally subglabrous, densely punctate; epistome indistinct.

Material examined.

Holotype (MZB): ARC3274 (EMBL # LN884982), C-Sulawesi Prov., Luwuk, Salodi, Gn. Taluanjang, 00°49.202'S 122°52.395'E, 702 m, sifted, 21-V-2013. Paratypes (MZB, SMNK): 5 exx, ARC3275 (GenBank # MK260406), ARC3276 (GenBank # MK260405), same data as holotype.

Distribution.

C-Sulawesi Prov. (Luwuk). Elevation ca. 700 m.

Biology.

In leaf litter of lower montane forest.

Etymology.

This epithet is a Latinized adjective based on the town of Luwuk.

Notes.

Trigonopterus luwukensis Riedel, sp. n. was coded as " Trigonopterus sp. 466".