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Holotype, male (Fig. 71a). Length 2.92 mm. Color of antennae ferruginous; legs dark ferruginous; remainder black. Body subovate; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median carina and pair of submedian ridges; intervening furrows with sparse rows of suberect narrow scales; epistome indistinct, punctate-rugose. Pronotum with weak lateral flanges, with weak subapical constriction; disk subquadrate, densely punctate with small punctures; interspaces between punctures subglabrous. Elytra irregularly punctate with small punctures; striae marked by hardly visible hairlines; basal margin bordered by slightly larger punctures; stria 8 along humerus with five large, coarse punctures. Femora edentate. Metafemur with anteroventral ridge crenate. Metafemur with dorsoposterior edge weakly crenate; subapically with stridulatory patch. Metatibia with dorsal edge in basal 1/3 weakly denticulate. Abdominal ventrites 1–2 concave, subglabrous; ventrite 5 flat, punctate, with erect scales. Penis (Fig. 71b) with sides of body subparallel; apex subangulate; apodemes 2.4 × as long as body of penis; transfer apparatus flagelliform, 1.3 × as long as body of penis, 0.4 × total length of penis; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.56–2.95 mm. Female rostrum slender, dorsally subglabrous, with two submedian rows of minute punctures, with pair of sublateral furrows. Female pronotum more slender. Female abdominal ventrite 5 with sparse recumbent scales.
Holotype (MZB): ARC3155 (GenBank # MK260522), SE-Sulawesi Prov., Kendari, road from Wawotobi to Lasolo, 03°45.086'S 122°12.976'E, 339 m, beaten, 17-IV-2013. Paratypes (MZB, SMNK): 3 exx, same data as holotype; 5 exx, ARC3150 (EMBL # LN884966), ARC3151 (GenBank # MK260524), ARC3152 (GenBank # MK260523), SE-Sulawesi Prov., Kendari, road from Wawotobi to Lasolo, 03°44.142'S 122°13.670'E, 482 m, beaten, 17-IV-2013.
SE-Sulawesi Prov. (Kendari). Elevation 340–480 m.
On foliage in lowland forests.
This epithet is a Latinized adjective based on the Greek prefix pseudo- (false) and the name of Trigonopterus fulvicornis (Pascoe) which is superficially very similar.
Trigonopterus pseudofulvicornis Riedel, sp. n. was coded as “Trigonopterus sp. 504”. Trigonopterus fulvicornis (Pascoe) differs mainly by the greater length of the transfer apparatus, which is about the penis’ total length in Trigonopterus fulvicornis (Pascoe) but only half the penis’ total length in Trigonopterus pseudofulvicornis Riedel, sp. n.
- Riedel, A; Narakusumo, R; 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi ZooKeys, (828): 1-153. doi