Trigonopterus manadensis Riedel

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

47. Trigonopterus manadensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 47a). Length 2.26 mm. Color of antennae and tarsi ferruginous; remainder black. Body subovate; in profile dorsally convex. Rostrum dorsally with median and pair of submedian ridges; intervening furrows with sparse rows of suberect setae; epistome short, posteriorly with transverse, angulate ridge. Pronotum with weak subapical constriction; disk densely punctate; in apical 1/2 forming broad ridge with impunctate median line; interspaces between punctures subglabrous, subequal to or smaller than punctures´ diameter. Elytra with striae marked by rows of small punctures; stria 8 and 9 along humerus with large, coarse punctures; sutural interval with additional row, other intervals subglabrous, with few interspersed punctures; elytral base weakly costate. Femora with anteroventral ridges ending with small tooth; anterior surface coarsely punctate, each puncture with recumbent yellowish seta. Metafemur with dorsoposterior edge denticulate; subapically with stridulatory patch. Abdominal ventrite 1 and anterior portion of ventrite 2 concave, subglabrous; ventrite 2 posteriorly forming rim; ventrite 5 weakly concave, almost flat; sparsely punctate. Penis (Fig. 47b) with sides of body in basal 1/2 rounded, converging to pointed apex; in profile body of penis markedly curved ventrad; apodemes 2.2 × as long as body of penis; transfer apparatus complex; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.22-2.36 mm. Female rostrum dorsally punctate-rugose, with median costa; epistome indistinct. Female abdominal ventrite 5 flat, subapically with sparse recumbent scales.

Material examined.

Holotype (MZB): ARC2753 (GenBank # MK260295), N-Sulawesi Prov., Tomohon, Rurukan, Gn. Mahawu, 01°21.409'N 124°51.535'E to 01°21.370'N 124°51.676'E, 1126-1231 m, beaten, 14-V-2012. Paratypes (MZB, SMNK): N-Sulawesi Prov.: 2 exx, ARC2752 (GenBank # MK260294), ARC2760 (GenBank # MK260287), same data as holotype; 10 exx, ARC2765 (GenBank # MK260288), ARC2766 (GenBank # MK260289), Tomohon, Rurukan, Gn. Mahawu, 01°21.697'N 124°51.885'E, 1176 m, 14-V-2012; 8 exx, Gn. Mahawu, Tomohon, 01°20.844'N 124°52.253'E, 1209 m, sifted, 15-V-2012; 7 exx, Tomohon, Rurukan, Gn. Mahawu, 1200 m, beaten, 30-XI-1999; 3 exx, Gn. Mahawu, Tomohon, 01°20.951'N 124°52.207'E, 1230 m, 14-V-2012, sifted; 11 exx, ARC6051 (GenBank # MK260293), ARC6052 (GenBank # MK260286), Gn. Mahawu, Tomohon, 01°20.791'N 124°52.268'E, 1230 m, sifted, 14-V-2012; 1 ex, Gn. Mahawu, Tomohon, 01°20.819'N 124°52.194'E, 1278 m, sifted, 15-V-2012; 1 ex, ARC6048 (GenBank # MK260292), Tomohon, Rurukan, Gn. Mahawu, 01°21.409'N 124°51.535'E, 1166 m, 14-V-2012, sifted; 2 exx, Airmadidi, Gn. Klabat, 01°26.430'N 125°00.622'E, 889 m, sifted, 17-V-2012; 3 exx, Airmadidi, Gn. Klabat, 01°26.505'N 125°00.636'E, 923 m, sifted, 16-V-2012; 5 exx, Airmadidi, Gn. Klabat, 01°26.619'N 125°00.805'E, 1018 m, sifted, 17-V-2012; 3 exx, ARC2789 (GenBank # MK260291), Airmadidi, Gn. Klabat, 01°26.635'N 125°00.823'E, 1031 m, sifted, 16-V-2012; 2 exx, Airmadidi, Gn. Klabat, 01°26.988'N 125°01.244'E, 1392 m, sifted, 17-V-2012; 1 ex, ARC0327 (GenBank # MK260290), Bitung, Gn. Dua Saudara, 01°29.417'N 125°09.150'E, sifted, 25-VI-2006.

Distribution.

N-Sulawesi Prov. (Tomohon, Mt Klabat, Mt Dua Saudara). Elevation 890-1390 m.

Biology.

On foliage in montane forests, rarely in leaf litter.

Etymology.

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

Notes.

Trigonopterus manadensis Riedel, sp. n. was coded as " Trigonopterus sp. 396".