Trigonopterus fuscipes Riedel

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

24. Trigonopterus fuscipes Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 24a). Length 2.75 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 with one median denticle and two less distinct pairs of submedian / sublateral denticles. Pronotum with disk punctate with small punctures; 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 and 9 along humerus with somewhat larger punctures. 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 yellowish setae. Abdominal ventrites 1-2 concave, subglabrous; ventrite 5 with deep, subglabrous pit, subapically punctate. Penis (Fig. 24b) with sides of body subparallel; apex with median subangulate extension, sparsely setose; apodemes 2.5 × as long as body; transfer apparatus complex, with anchor-shaped basal sclerite; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.70-2.75 mm. Female rostrum slender, with median row of punctures and pair of sublateral furrows; epistome simple. Female metatibia only subapically setose.

Material examined.

Holotype (MZB): ARC2994 (GenBank # MK260571), 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): S-Sulawesi Prov., Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim): 24 exx, ARC2995 (GenBank # MK260570), ARC5987 (GenBank # MK260575), ARC5989 (GenBank # MK260574), ARC5991 (GenBank # MK260572), same data as holotype; 1 ex, ARC6026 (GenBank # MK260569), 02°59.021'S 120°02.523'E, 1456 m, sifted, 06-V-2013; 18 exx, ARC6002 (GenBank # MK260577), ARC6004 (GenBank # MK260573), 02°59.013'S 120°02.251'E, 1423 m, beaten, 06-V-2013; 20 exx, ARC6012 (GenBank # MK260578), ARC6013 (GenBank # MK260576), 02°58.846'S 120°02.158'E, 1396 m, beaten, 06-V-2013.

Distribution.

S-Sulawesi Prov. (Tanah Toraja). Elevation 1400-1460 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is a combination of the Latin adjective fuscus, -a, -um (dark, tawny) and the noun pes (foot, leg). A noun in apposition.

Notes.

Trigonopterus fuscipes Riedel, sp. n. was coded as " Trigonopterus sp. 526". This species is very closely related to T. asterix Riedel, sp. n., from which it differs by ca. 12% p-distance of cox1 and by the structure of the male genitalia.