Taxon classification Animalia Coleoptera Curculionidae

81. Trigonopterus silvestris Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 81a). Length 3.25 mm. Color of legs and head ferruginous, remainder black. Body elongate; in dorsal aspect with marked constriction between pronotum and elytron; in profile dorsally with indistinct constriction. Rostrum with median carina terminating on forehead; with pair of submedian ridges; intervening furrows each with sparse row of erect, piliform scales; epistome medially with transverse ridge, without denticle. Pronotum anterolaterally subangularly projecting; without distinct subapical constriction; disk coarsely rugose-punctate; each puncture containing suberect piliform scale; with median ridge. Elytra with striae deeply impressed; each with row of suberect piliform scales; intervals weakly carinate; costa of interval 2 shortened at base; interval 7 swollen subapically, laterally weakly projecting; apex extended ventrad, beak-shaped. Meso- and metafemur with crenulate anteroventral ridge terminating with blunt tooth. Metafemur subapically with stridulatory patch and transverse row of denticles. Abdominal ventrite 5 almost flat, subapically with shallow pit. Penis (Fig. 81b) with body in profile moderately curved ventrad; in dorsal aspect sides subparallel in basal half, anteriorly gently diverging; apex subangulate, without median extension; apodemes 2.0 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.79-3.34 mm. Female rostrum dorsally with pairs of lateral and submedian furrows; epistome simple. Elytral apex in males rounded; in females narrower, with distinct median notch. Female abdominal ventrite 5 flat.

Material examined.

Holotype (MZB): ARC2668 (EMBL # LM655926), West Java Prov., Sumedang, Sukajadi, Mt. Cakrabuana, sample 3, S07°01.493', E108°08.065', 1394 m, 19-IV-2012. Paratypes (MZB, SMNK, ZSM): W-Java Prov., Sumedang, Sukajadi, Mt. Cakrabuana: 7 exx, ARC2669 (EMBL # LM655927), ARC2670 (EMBL # LM655928), same data as holotype; 1 ex, sample 2, S07°01.243', E108°08.056', 1292 m, 19-IV-2012; 2 exx, sample 4, S07°01.734', E108°08.059', 1530 m, 19-IV-2012; 4 exx, sample 5, S07°01.804', E108°08.044', 1563 m, 20-IV-2012.

Distribution.

W-Java Prov. (Mt. Cakrabuana). Elevation: 1292-1563 m.

Etymology .

This epithet is based on the Latin adjective silvestris (living in the forest) and refers to the species habitat.

Notes.

Trigonopterus silvestris Riedel, sp. n. was coded as " Trigonopterus sp. 373".