Trigonopterus lampros Riedel

Riedel, Alexander & Narakusumo, Raden Pramesa, 2019, One hundred and three new species of Trigonopterus weevils from Sulawesi, ZooKeys 828, pp. 1-153 : 1

42. Trigonopterus lampros Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 42a). Length 2.49 mm. Color of antennae light ferruginous; legs and rostrum dark ferruginous; remainder black with bronze luster. Body subglobose; in dorsal aspect with distinct constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with distinct median carina and pair of submedian ridges; intervening furrows each with row of erect, clavate scales; epistome short, subglabrous, indistinct. Pronotum laterally with marked subapical constriction; disk coarsely punctate; interspaces subglabrous, reticulate; with subglabrous median costa. Elytra with basal margin subangulate; densely punctate with coarse punctures, especially near base where punctures partly confluent; interspaces subglabrous; each puncture with suberect to subrecumbent, weakly clavate, scale. Femora edentate; anteroventral ridge distinct; anterior surface rugose-punctate, microgranulate, dull, with sparse subrecumbent scales. Metafemur dorsally denticulate; subapically with stridulatory patch. Metatibia with dorsal edge denticulate; ventrally with fringe of sparse setae. Abdominal ventrites 1-2 concave, subglabrous, sparsely punctate, with sparse suberect scales; ventrite 5 flat, densely coarsely punctate, with suberect slender scales. Penis (Fig. 42b) with sides of body subparallel, slightly widening before weakly extended apex; apodemes 2.9 × as long as body of penis; transfer apparatus complex, asymmetrical; ductus ejaculatorius with distinct bulbus. Intraspecific variation. Length 2.18-2.49 mm. Female rostrum dorsally flattened, with ridges less distinct; with median costa and pair of submedian costae less distinct, anteriorly separated by row of punctures.

Material examined.

Holotype (MZB): ARC3196 (EMBL # LN884973), S-Sulawesi Prov., Selayar Is, Bahorea, 06°20.484'S 120°30.127'E, 368 m, sifted, 25-IV-2013. Paratype (SMNK): 1 ex, ARC3188 (GenBank # MK260426), S-Sulawesi Prov., Selayar Is, Pagarangan, 06°18.334'S 120°30.794'E, 545 m, 24-IV-2013.

Distribution.

S-Sulawesi Prov. (Selayar Is). Elevation 370-545 m.

Biology.

In leaf litter of lowland forest.

Etymology.

This epithet is based on the Greek adjective lampros (shining, bright) and refers to the species´ metallic luster. To be treated as a noun in apposition.

Notes.

Trigonopterus lampros Riedel, sp. n. was coded as " Trigonopterus sp. 478".