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Holotype, male (Fig. 79a). Length 2.02 mm. Color of antennae and tarsi ferruginous; remainder black, body with bronze luster. Body subglobose; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median and pair of submedian ridges; intervening furrows with sparse rows of setae; epistome short, posteriorly with transverse, subangulate ridge. Pronotum with disk coarsely punctate; interspaces between punctures subglabrous, subequal to or smaller than punctures´ diameter; median line weakly costate. Elytra with striae marked by small punctures; each puncture bearing short subrecumbent seta; stria 8 near humerus with six larger punctures, externally bordered by costa; intervals subglabrous. Femora dentate; anteroventral ridges crenate, ending with acute tooth. Metafemur with indistinct posteroventral ridge bearing a second acute tooth; subapically with stridulatory patch. Abdominal ventrites 1–2 concave, subglabrous, microreticulate; ventrite 5 flat, sparsely punctate, microreticulate. Penis (Fig. 79b) with sides of body subparallel; apex subtruncate with subtriangular median extension; behind ostium with pair of elongate endophallic sclerites; apodemes 3.2 × as long as body of penis; transfer apparatus spiniform; ductus ejaculatorius with distinct bulbus. Intraspecific variation. Length 1.98–2.02 mm. Female rostrum more slender, in apical 1/2 dorsally subglabrous, with sparse punctures and pair of sublateral furrows.
Holotype (MZB): ARC3137 (GenBank # MK260441), C-Sulawesi Prov., Pendolo, Boe, 02°05.405'S 120°38.551'E, 857 m, sifted, 15-V-2013. Paratypes (MZB, SMNK): S-Sulawesi Prov.: 13 exx, ARC3136 (EMBL # LN884962), ARC3138 (GenBank # MK260443), ARC6017 (GenBank # MK260444), ARC6018 (GenBank # MK260440), ARC6019 (GenBank # MK260442), same data as holotype.
C-Sulawesi Prov. (Pendolo). Elevation ca. 860 m.
In leaf litter of montane forest.
This epithet is the diminutive form of the Latin adjective rotundatus, -a, -um (rounded) and refers to the species´ body shape.
Trigonopterus rotundulus Riedel, sp. n. was coded as “Trigonopterus sp. 483”.
- Riedel, A; Narakusumo, R; 2019: One hundred and three new species of Trigonopterus weevils from Sulawesi ZooKeys, (828): 1-153. doi