Trigonopterus rantepao Riedel

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

75. Trigonopterus rantepao Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 75a). Length 2.73 mm. Color of antennae and legs ferruginous; remainder black. Body subovate; in profile dorsally convex. Rostrum dorsally with median and pair of submedian costae; intervening furrows with sparse rows of suberect piliform scales; epistome indistinct, subglabrous, with sparse setae. Pronotum with disk densely punctate with small punctures; interspaces between punctures subglabrous. Elytra irregularly punctate with small punctures, along basal margin with transverse row of denser punctures; some striae marked by hardly visible hairlines; intervals flat; stria 8 along humerus with seven distinct punctures. Femora with denticle. Meso- and metafemur with anteroventral ridge crenate, ending with denticle in apical 1/3. Metafemur dorsally with row of suberect, silvery scales; dorsoposterior edge crenate in apical 1/3; subapically with stridulatory patch. Metatibia ventrally with row of sparse thin setae; dorsal outline subapically weakly concave. Abdominal ventrites 1-2 concave, subglabrous; in profile ventrite 2 subangularly projecting; ventrite 5 at middle with shallow pit, laterally punctate. Penis (Fig. 75b) with sides of body subparallel; apex rounded, nude; apodemes 1.5 × as long as body of penis; transfer apparatus spiniform, directed basad in repose, surrounded by complex of supporting sclerites; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.60-2.78 mm. Female rostrum slender, subglabrous, with two submedian rows of punctures, with pair of sublateral furrows. Female abdominal ventrite 5 flat, coarsely punctate.

Material examined.

Holotype (MZB): ARC2987 (GenBank # MK260341), S-Sulawesi Prov., Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°59.021'S 120°02.523'E, 1456 m, beaten, 06-V-2013. Paratypes (MZB, SMNK, ZSM): S-Sulawesi Prov.: 5 exx, ARC2988 (GenBank # MK260340), ARC2989 (GenBank # MK260338), same data as holotype; 4 exx, ARC5993 (GenBank # MK260344), ARC5994 (GenBank # MK260342), Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°59.013'S 120°02.251'E, 1423 m, beaten, 06-V-2013; 2 exx, Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°58.846'S 120°02.158'E, 1396 m, beaten, 06-V-2013; 14 exx, ARC2821 (EMBL # LN884933), ARC2822 (GenBank # MK260346), ARC6049 (GenBank # MK260345), Pc. Palopo, Gn. Sampuna, 02°56.539'S 120°05.320'E to 02°56.545'S 120°05.595'E, 1038-1101 m, beaten, 29-V-2012; 5 exx, ARC5999 (GenBank # MK260343), ARC6000 (GenBank # MK260339), ARC6001 (GenBank # MK260347), Pc. Palopo, Gn. Sampuna, 02°56.539'S 120°05.320'E to 02°56.545'S 120°05.595'E, 1038-1101 m, beaten, 02-V-2013.

Distribution.

S-Sulawesi Prov. (Tanah Toraja, Pc. Palopo). Elevation 1100-1460 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is based on the town of Rantepao, center of the Land of Toraja. It is treated as a noun in apposition.

Notes.

Trigonopterus rantepao Riedel, sp. n. was coded as " Trigonopterus sp. 409". It is closely related to T. toraja Riedel, sp. n. from which it can be distinguished by the structure of the penis.