Holotype, male (Fig. 13a). Length 2.78 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 with median ridge and pair of submedian ridges, intervening furrows each with sparse row of mesad directed scales; epistome with transverse ridge. Pronotum coarsely punctate, reticulate, with indistinct median costa; with sparse, recumbent scales. Elytra with striae dorsally deeply incised, laterally marked by rows of coarse punctures; intervals markedly costate, dorsally flattened, with rows of punctures; sutural interval basally hardly widened; each puncture containing small recumbent scale; elytral apex subtruncate. Femora with simple anteroventral ridge. Metafemur subapically with stridulatory patch. Abdominal ventrite 5 coarsely punctate, with sparse suberect scales. Penis (Fig. 13b) with sides of body subparallel; apex with median angulate extension; transfer apparatus with thin median rod 1.4 × as long as body; median rod projecting basad; apodemes 2.6 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.48–2.78 mm. Color of elytra dark ferruginous to black. Female rostrum in apical half slender, dorsally subglabrous, with submedian rows of punctures, laterally punctate-rugose; epistome simple.

Holotype (MZB): ARC2303 (EMBL # LM655757), Bali, Mt. Batukaru, Wangayagede, sample 3, S08°21.431', E115°05.699', 1170 m, 31-III-2011. Paratypes (MZB, SMNK): Bali, Mt. Batukaru, Wangayagede: 3 exx, ARC2304 (EMBL # LM655758), ARC2305 (PCR failed), same data as holotype; 1 ex, ARC2302 (EMBL # LM655756), sample 1, S08°22.295', E115°06.048', 835 m, 31-III-2011; 1 ex, Mt. Batukaru, Wangayagede, sample 4, S08°21.373', E115°05.564', 1310 m, 31-III-2011; 3 exx, ARC2951 (EMBL # LM656004), ARC2952 (EMBL # LM656005), ARC2953 (EMBL # LM656006), sample 4, S08°21.373', E115°05.564', 31-III-2011.

Bali (Mt. Batukaru). Elevation: 835–1310 m.

This epithet is based on the type locality Mt. Batukaru.

Trigonopterus batukarensis Riedel, sp. n. was coded as “Trigonopterus sp. 340” by Tänzler et al. (2014).