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Holotype, male (Fig. 6a). Length 2.58 mm. Color of head and legs ferruginous, remainder black. Body subhexagonal; in dorsal aspect with marked constriction between pronotum and elytron; with distinct constriction in profile. Rostrum with median ridge and pair of submedian ridges, intervening furrows punctate; punctures each with long erect scale; epistome with transverse, angulate ridge forming median denticle. Pronotum anterolaterally angularly projecting; with distinct subapical constriction; disk rugose-punctate, punctures each with slender suberect to subrecumbent scale; with median ridge. Elytra with striae deeply impressed, each with row of stout suberect bristles; intervals costate to carinate, almost nude; interval 3 most prominent; interval 7 swollen subapically, laterally projecting. Femora edentate. Metafemur subapically with stridulatory patch and transverse rows of denticles. Abdominal ventrite 5 swollen, at middle with shallow impression, sparsely setose. Penis (Fig. 6b) with sides of body subparallel, apex medially pointed; endophallic sclerites asymmetrical; transfer apparatus flagelliform, ca. 2 × as long as body; apodemes 2.0 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.45–2.58 mm. Female rostrum dorsally with pairs of lateral and submedian furrows; epistome simple. Female abdominal ventrite 5 flat, with median tooth markedly projecting from profile.
Holotype (MZB): ARC2654 (EMBL # LM655912), West Java Prov., Sukabumi, Mt. Gede, Cisaat, Situ Gunung, sample 1, S06°49.377', E106°55.729', 1281 m, 15-IV-2012. Paratypes (MZB, SMNK): W-Java Prov., Sukabumi, Mt. Gede, Cisaat, Situ Gunung: 3 exx ARC2655 (EMBL # LM655913), same data as holotype; 2 exx, ARC2658 (EMBL # LM655916), ARC2659 (EMBL # LM655917), sample 2, S06°49.038', E106°55.852', 1342 m, 15-IV-2012.
W-Java Prov. (Mt. Gede). Elevation: 1281–1342 m.
This epithet is a combination of the Latin adjective angularis (angular) and the noun collum (neck, pronotum).
- Riedel, A; Tänzler, R; Balke, M; Rahmadi, C; Suhardjono, Y; 2014: Ninety-eight new species of Trigonopterus weevils from Sundaland and the Lesser Sunda Islands ZooKeys, (467): 1-162. doi
- Tänzler R, Toussaint E, Suhardjono Y, Balke M, Riedel A (2014) Multiple transgressions of Wallace’s Line explain diversity of flightless Trigonopterus weevils on Bali. Proceedings of the Royal Society B: Biological Sciences 281: 20132528. doi: 10.1098/rspb.2013.2528