Trigonopterus asterix Riedel

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

10. Trigonopterus asterix Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 10a). Length 2.68 mm. Color of antennae and legs ferruginous; remainder black. Body subovate; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median and pair of submedian ridges; intervening furrows each with sparse row of recumbent piliform scales; epistome posteriorly with subangulate, transverse, irregularly interrupted ridge. Pronotum with disk punctate with small punctures; each puncture containing a single seta; interspaces subglabrous. Elytra punctate with small punctures; striae marked by fine hairlines; irregular intervals each with additional sparse row of punctures; interspaces between punctures subglabrous; stria 8 along humerus with four large, coarse punctures, externally bordered by weakly raised interval 9. Femora edentate; anterior surface punctate with small punctures, each with recumbent piliform scale. Metafemur subapically with stridulatory patch. Protibia widened to apex. Posterior face of metatibia in apical 1/2 with dense fringe of yellowish setae. Abdominal ventrites 1-2 concave, subglabrous; ventrite 5 with deep, subglabrous pit, laterally and subapically punctate and sparsely setose. Penis (Fig. 10b) with sides of body subparallel; apex subangulate, without setae; body dorsally with median ridge, forming angulate profile; apodemes 2.0 × as long as body; transfer apparatus complex, with basal sclerite shaped as an inverted V; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.40-2.81 mm. Female rostrum slender, dorsally with median row of punctures and pair of sublateral furrows; epistome simple. Female metatibia only subapically setose. Female ventrite 5 flat, subglabrous, sparsely punctate.

Material examined.

Holotype (MZB): ARC3007 (GenBank # MK260221), S-Sulawesi Prov., Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°59.013'S 120°02.251'E, 1423 m, beaten, 06-V-2013. Paratypes (MZB, SMNK): S-Sulawesi Prov.: 6 exx, ARC2993 (GenBank # MK260222), ARC5988 (GenBank # MK260216), ARC5992 (GenBank # MK260226), Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°59.021'S 120°02.523'E, 1456 m, 06-V-2013, beaten; 1 ex, ARC ARC6028 (GenBank # MK260225), Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°59.021'S 120°02.523'E, 1456 m, 06-V-2013, sifted; 4 exx, Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°58.846'S 120°02.158'E, 1396 m, beaten, 06-V-2013; 4 exx, ARC3008 (GenBank # MK260220), ARC6003 (GenBank # MK260227), same data as holotype; 24 exx, ARC2824 (GenBank # MK260223), ARC2825 (GenBank # MK260219), ARC2826 (GenBank # MK260218), ARC2827 (GenBank # MK260217), ARC6050 (GenBank # MK260224), Pc. Palopo, Gn. Sampuna, 02°56.539'S 120°05.320'E to 02°56.545'S 120°05.595'E, 1038-1101 m, 29-V-2012, beaten; 1 ex, ARC6005 (GenBank # MK260228), Pc. Palopo, Gn. Sampuna, 02°56.539'S 120°05.320'E to 02°56.545'S 120°05.595'E, 1038-1101 m, 02-V-2013, beaten.

Distribution.

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

Biology.

On foliage in montane forests.

Etymology.

This epithet is based on a character of the French Asterix comics. It is a noun in apposition.

Notes.

Trigonopterus asterix Riedel, sp. n. was coded as " Trigonopterus sp. 378". This species is very closely related to T. fuscipes Riedel, sp. n., from which it differs by ca. 12% p-distance of cox1 and by the structure of the male genitalia.