Trigonopterus matalibaruensis Riedel

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

49. Trigonopterus matalibaruensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 49a). Length 2.81 mm. Color of antennae ferruginous; legs dark ferruginous; remainder black. Body subovate; in profile dorsally convex. Rostrum dorsally with median and pair of submedian costae separated by row of coarse punctures; with sparse rows of suberect setae; epistome sparsely punctate, with minute median denticle. Pronotum with disk densely punctate; median line impunctate; interspaces between punctures subglabrous, subequal to punctures´ diameter. Elytra with striae marked by rows of small punctures and hairlines; along basal margin with transverse row of denser punctures; stria 8 along humerus with larger punctures; intervals flat, subglabrous, with few punctures. Femora edentate. Metafemur with dorsoposterior edge denticulate; subapically with stridulatory patch. Posterior face of metatibia in apical 1/2 with dense long setae, subapically forming inward curved brush. Abdominal ventrites 1-2 concave, microreticulate, with erect, slender scales; ventrite 5 concave, subglabrous, with sparse punctures. Penis (Fig. 49b) with sides of body subparallel, converging to subacute apex; apodemes 2.8 × as long as body of penis; transfer apparatus flagelliform, supported by complex sclerites, directed basad in repose, 1.5 × longer than body of penis; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.65-2.88 mm. Female rostrum slender, dorsally subglabrous, with rows of small punctures; epistome simple. Female metatibia subapically only with small patch of setae, without curved brushes. Female abdominal ventrites 1-2 flat, nude; ventrite 5 flat.

Material examined.

Holotype (MZB): ARC2889 (GenBank # MK260235), N-Sulawesi Prov., Kotamobagu, Matalibaru, 00°32.445'N 124°14.185'E, 956 m, beaten, 20-V-2012. Paratypes (SMNK): 2 exx, ARC2890 (GenBank # MK260236), ARC2891 (GenBank # MK260237), same data as holotype.

Distribution.

N-Sulawesi Prov. (Kotamobagu). Elevation 960 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is a Latinized adjective based on the town Matalibaru which is close to the type locality.

Notes.

Trigonopterus matalibaruensis Riedel, sp. n. was coded as " Trigonopterus sp. 381".