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Holotype, male (Fig. 86a). Length 2.38 mm. Color of legs and antennae ferruginous, remainder dark ferruginous to 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 erect narrow scale; epistome with transverse ridge. Pronotum anterolaterally angularly projecting; with distinct subapical constriction; disk coarsely punctate, each puncture containing one clavate scale; interspaces dull, microreticulate; indistinct median ridge subglabrous. Elytra with striae deeply impressed, each with row of suberect slender yellowish scales; intervals costate to carinate; intervals 1, 3, 5 more distinctly raised; interval 7 swollen subapically, laterally projecting. Profemur edentate, meso- and metafemur ventrally with little tooth. Metafemur subapically with stridulatory patch and transverse rows of denticles. Abdominal ventrite 5 flat. Penis (Fig. 86b) with body in profile markedly curved ventrad; in dorsal aspect sides subparallel; apex with short median extension rounded; transfer apparatus flagelliform, ca. 2 × as long as body; apodemes 2.2 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.28–2.55 mm. Color of body ferruginous or black. Female rostrum dorsally with pairs of lateral and submedian furrows; epistome simple. Pronotum with anterolateral knobs projecting subrectangularly in males, more acute in females.
Holotype (MZB): ARC2743 (EMBL # LM655999), East Sumatra, Lampung Prov., Gisting, Sidokaton, Mt. Tanggamus, sample 2, S05°25.491', E104°41.006', 1636 m, 03-V-2012. Paratypes (MZB, SMNK, ZSM): E-Sumatra, Lampung Prov.: 23 exx, ARC0275 (EMBL # LM655466), ARC0276 (EMBL # LM655467), ARC0277 (EMBL # LM655468), ARC0278 (EMBL # LM655469), ARC0279 (EMBL # LM655470), ARC0393, Sumberjaya, Bodongjaya, Mt. Rigis, sample 3, S05°03.140', E104°26.912', 1351 m, 12-VIII-2006; 27 exx, ARC2738 (EMBL # LM655994), ARC2739 (EMBL # LM655995), ARC2740 (EMBL # LM655996), Gisting, Sidokaton, Mt. Tanggamus, sample 1, S05°25.475', E104°41.063', 1539 m, 03-V-2012; 5 exx, Gisting, Sidokaton, Mt. Tanggamus, sample 2, S05°25.491', E104°41.006', 1636 m, 03-V-2012; 8 exx, ARC2745 (EMBL # LM656001), Gisting, Sidokaton, Mt. Tanggamus, sample 4, S05°25.484', E104°41.027', 1632 m, 03-V-2012.
Lampung Prov. (Sumberjaya, Mt. Tanggamus). Elevation: 1351–1636 m.
This epithet is based on the name of Sumatra Island.
Trigonopterus sumatrensis Riedel, sp. n. was coded as “Trigonopterus sp. 300”.
- 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