Trigonopterus barbipes Riedel

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

11. Trigonopterus barbipes Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 11a). Length 2.65 mm. Color of antennae and legs ferruginous; remainder black. Body subovate; in dorsal aspect with distinct constriction between pronotum and elytron; in profile with weak constriction. Rostrum dorsally with median costa and pair of submedian ridges; intervening furrows each with row of suberect scales; apical 1/3 punctate-rugose, with indistinct epistome. Pronotum with weak subapical constriction; disk densely punctate; interspaces between punctures subglabrous; indistinct lateral edges more densely punctate, median line impunctate. Elytra irregularly punctate; some striae marked by hardly visible hairlines; basal margin bordered by denser punctures; stria 8 along humerus with six large, coarse punctures. Femora edentate; anteroventral ridge of mesofemur and metafemur crenate; anterior surface of metafemur coarsely punctate, each puncture with subrecumbent silvery scale. Metafemur subapically with stridulatory patch. Metatibia near middle with dense, beard-like cluster of long setae; subapically ventral surface subglabrous, lined by setose fringes. Abdominal ventrites 1-2 concave, punctate, with sparse suberect lanceolate scales; ventrite 5 with distinct, round depression, with suberect lanceolate scales. Penis (Fig. 11b) with sides weakly sinuate; apex with median notch, without setae; apodemes 1.7 × as long as body of penis; transfer apparatus complex; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.50-2.65 mm.

Material examined.

Holotype (MZB): ARC3048 (GenBank # MK260526), S-Sulawesi Prov., Tanah Toraja, Bittuang, Gn. Ponding, 02°56.446'S 119°38.075'E, 1625 m, beaten, 09-V-2013. Paratypes (MZB, SMNK): 2 exx, ARC3047 (EMBL # LN884953), ARC3049 (GenBank # MK260525), same data as holotype.

Distribution.

S-Sulawesi Prov. (Tanah Toraja). Elevation ca. 1625 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is a combination of the Latin nouns barba (beard) and pes (foot). It refers to the setose metatibia. Invariable.

Notes.

Trigonopterus barbipes Riedel, sp. n. was coded as " Trigonopterus sp. 505".