Holotype, male (Fig. 51a). Length 2.65 mm. Color of tarsi and antennae ferruginous; remainder black. Body elongate subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum in apical half scabrous, in basal half with median and pair of submedian ridges; with elongate, clavate, suberect scales; epistome with transverse, angulate ridge. Pronotum with indistinct subapical constriction; disk coarsely punctate; with median ridge; each puncture containing erect clavate scale inserting at posterior rim; surface dull, microreticulate. Elytra elongate; in profile with slight depression behind middle; with striae deeply impressed, in front of each puncture with claviform, suberect scale; intervals costate, subglabrous. Femora edentate. Metafemur subapically without stridulatory patch. Abdominal ventrite 5 flat, microreticulate, with sparse scales. Penis (Fig. 51b) with apex asymmetrically extended to the left; apical extension long; basal orifice ventrally with rim; apodemes short, 0.5 × as long as body; ductus ejaculatorius with bulbus. Intraspecific variation. Length 2.30–2.65 mm. Female rostrum dorsally in apical half subglabrous, with small punctures; epistome simple. Profile of elytral apex in females more slender than in males, more distinctly curved ventrad.

Holotype (MZB): ARC0263 (EMBL # LM655454), E-Sumatra, Lampung Prov., Bawang, Pedada Bay, Mt. Tanggang, sample 1, S05°43.933', E105°06.598', 579 m, 09-VIII-2006. Paratypes (MZB, SMNK, ZSM): E-Sumatra, Lampung Prov., Bawang, Pedada Bay, Mt. Tanggang: 2 exx, ARC0264 (EMBL # LM655455), ARC0265 (EMBL # LM655456), same data as holotype; 2 exx, sample 2, S05°43.947', E105°06.480', 659 m, 09-VIII-2006.

Lampung Prov. (Pedada Bay). Elevation: 579–744 m.

This epithet is based on the Latin adjective misellus (poor).

Trigonopterus misellus Riedel, sp. n. was coded as “Trigonopterus sp. 336”.