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Holotype, male (Fig. 33a). Length 2.24 mm. Color of antennae and tarsi ferruginous; legs dark ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with weak constriction between pronotum and elytron. Rostrum dorsally with rows of coarse punctures each containing one recumbent seta; medially with indistinct subglabrous costa; epistome indistinct, with median denticle. Pronotum with disk densely punctate; each puncture containing fine, recumbent seta; interspaces between punctures subglabrous. Elytra with striae marked by rows of small punctures and fine hairlines, more distinctly impressed near base; intervals subglabrous, with interspersed punctures; stria 8 along humerus with row of coarse punctures. Femora edentate. Meso- and metafemur with anteroventral ridge weakly crenate; anterior surface densely coarsely punctate-rugose, each puncture with recumbent piliform scale. Metafemur with dorsoposterior edge simple, indistinct; subapically with stridulatory patch. Abdominal ventrites 1–2 concave, subglabrous, microreticulate, weakly rugose; ventrite 5 with median depression bordered by sublateral swellings, punctate, microreticulate. Penis (Fig. 33b) with sides of body subparallel; apex subangulate, with sparse setae; apodemes 2.2 × as long as body of penis; endophallus with several sclerites; transfer apparatus anchor-shaped; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.24–2.38 mm. Female rostrum slender; dorsally subglabrous, with submedian rows of minute punctures, sublaterally coarsely punctate.
Holotype (MZB): ARC3025 (EMBL # LN884950), S-Sulawesi Prov., Tanah Toraja, Bittuang, Gn. Ponding, 02°56.446'S 119°38.075'E, 1625 m, sifted, 09-V-2013. Paratypes (MZB, SMNK): 2 exx, ARC3026 (GenBank # MK260531), ARC6031 (GenBank # MK260532),same as holotype; 2 exx, ARC3037 (GenBank # MK260533), ARC3038 (GenBank # MK260529), Tanah Toraja, Bittuang, Gn. Ponding, 02°56.446'S 119°38.075'E, 1625 m, beaten; 1 ex, ARC2996 (GenBank # MK260530), Tanah Toraja, Rantepao, Gn. Karre (= Gn. Wokim), 02°59.021'S 120°02.523'E, 1456 m, beaten, 06-V-2013.
S-Sulawesi Prov. (Tanah Toraja). Elevation 1460–1625 m.
Uncertain if more often on foliage or in leaf litter.
This epithet is the Latin adjective incognitus, -a, -um (unknown).
Trigonopterus incognitus Riedel, sp. n. was coded as “Trigonopterus sp. 510”.
- Riedel, A; Narakusumo, R; 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi ZooKeys, (828): 1-153. doi