Trigonopterus rotundatus Riedel

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

78. Trigonopterus rotundatus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 78a). Length 3.00 mm. Color of antennae ferruginous; legs dark ferruginous; remainder black. Body subovate; in profile dorsally convex. Rostrum dorsally with median carina and pair of lower submedian ridges; intervening furrows each with sparse row of erect scales; epistome indistinct, with weak median denticle. Pronotum with disk densely punctate; interspaces between punctures subglabrous, subequal to punctures´ diameter; median line impunctate. Elytra with striae marked by minute punctures and indistinct hairlines; stria 8 along humerus with seven large punctures; intervals subglabrous, with sparse rows of minute punctures. Femora edentate; anteroventral ridges simple; anterior surface densely coarsely punctate, each puncture with subrecumbent, dorsally erect scale. Metafemur with dorsoposterior edge denticulate; subapically with stridulatory patch. Metatibia ventrally with sparse row of long, stiff setae. Abdominal ventrites 1-2 concave, subglabrous; ventrite 5 weakly concave, almost flat, coarsely punctate. Penis (Fig. 78b) with sides of body diverging; subapically rounded, with short median extension; apodemes 2.1 × as long as body of penis; endophallus with complex sclerites; transfer apparatus complex, largely composed of membranous lobes; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.59-3.00 mm. Female rostrum dorsally with median and pair of submedian costae in basal 1/3; anteriorly slender, dorsally subglabrous, with rows of punctures.

Material examined.

Holotype (MZB): ARC2848 (GenBank # MK260307), C-Sulawesi Prov., Lake Poso area, Pendolo, Gn. Sampuraga, 02°12.476'S 120°45.506'E, 1050 m, beaten, 31-V-2012. Paratypes (MZB, SMNK): S-Sulawesi Prov.: 1 ex, ARC3235 (GenBank # MK260306), Mangkutana, 02°20.203'S 120°46.878'E, 903 m, 14-V-2013, sifted; C-Sulawesi Prov., Lake Poso area: 8 exx, ARC3114 (GenBank # MK260310), ARC3115 (GenBank # MK260304), ARC3116 (GenBank # MK260305), Pendolo, Gn. Sampuraga, 02°12.165'S 120°45.567'E to 02°12.308'S 120°45.544'E, 934-1011 m, 13-V-2013, beaten; 1 ex, Pendolo, Gn. Sampuraga, 02°12.165'S 120°45.567'E, 934 m, 13-V-13, sifted; 1 ex, Pendolo, Gn. Sampuraga, 02°12.308'S 120°45.544'E, 1011 m, 13-V-13, sifted; 4 exx, ARC2876 (EMBL # LN884942), ARC2877 (GenBank # MK260309), ARC2878 (GenBank # MK260308), ARC6071 (GenBank # MK260303), Tentena, Taripa, 01°49.858'S 120°47.108'E to 01°50.040'S 120°46.666'E, 896-911 m, 02-VI-2012, beaten.

Distribution.

C-Sulawesi Prov. (Pendolo, Taripa); S-Sulawesi Prov. (Mangkutana). Elevation 900-1050 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is the Latin participle rotundatus, -a, -um (rounded) and refers to the species´ habitus.

Notes.

Trigonopterus rotundatus Riedel, sp. n. was coded as " Trigonopterus sp. 401".