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Holotype, male (Fig. 36a). Length 2.43 mm. Color of antennae and tarsi ferruginous; remainder black. Body subovate; in profile dorsally convex. Rostrum dorsally with median carina; in basal 1/2 with submedian ridges; intervening furrows with sparse rows of piliform scales; epistome indistinct. Pronotum with disk densely punctate with small punctures; interspaces between punctures subglabrous. Elytra with striae marked by minute punctures and indistinct hairlines; basal margin bordered by transverse row of deeper punctures, curving along humeri; intervals flat, subglabrous. Femora edentate. Meso- and metafemur with anteroventral ridge distinct, simple. Metafemur with anterior surface coarsely punctate, each puncture with elongate recumbent silvery scale; with dorsoposterior edge weakly denticulate; subapically with stridulatory patch. Abdominal ventrites 1–2 concave, subglabrous; ventrite 5 flat, coarsely punctate. Penis (Fig. 36b) with sides converging in basal 1/2, anteriorly subparallel; apex subangulate, with few setae; basal orifice of body ventrally with angulate extensions; apodemes 2.2 × as long as body of penis; transfer apparatus complex, small, elongate; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.43–2.55 mm. Female rostrum slender, dorsally subglabrous, with two submedian rows of punctures, with pair of sublateral furrows. Female abdominal ventrite 5 flat, punctate, with sparse scales.
Holotype (MZB): ARC3189 (EMBL # LN884972), S-Sulawesi Prov., Selayar Is, Pagarangan, 06°18.334'S 120°30.794'E, 545 m, beaten, 24-IV-2013. Paratypes (MZB, SMNK): 3 exx, ARC3190 (GenBank # MK260517), ARC3191 (GenBank # MK260516), same data as holotype.
S-Sulawesi Prov. (Selayar Is). Elevation ca. 545 m.
On foliage in lowland forests.
This epithet is the Latin adjective invalidus, -a, -um (invalid, weak) and refers to the state of the holotype.
Trigonopterus invalidus Riedel, sp. n. was coded as “Trigonopterus sp. 502”.
- Riedel, A; Narakusumo, R; 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi ZooKeys, (828): 1-153. doi