Trigonopterus sulawesiensis Riedel

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

93. Trigonopterus sulawesiensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 93a). Length 2.53 mm. Color of antennae ferruginous; legs dark ferruginous to black; remainder black. Body subovate; in dorsal aspect and in profile with weak constriction between pronotum and elytron. Rostrum dorsally with median and pair of submedian costae, anteriorly punctate; furrows with rows of suberect scales; epistome medially carinate, posteriorly with denticle. Pronotum with disk densely punctate; interspaces between punctures subglabrous, subequal to punctures´ diameter; median line impunctate. Elytra with striae marked by hairlines and rows of fine punctures; basal margin bordered by dense punctures; sutural interval punctate, other intervals subglabrous. Profemur with anteroventral ridge simple; meso- and metafemur with anteroventral ridge crenate, ending with denticle in apical 1/4; anterior surface of femora coarsely punctate, each puncture with narrow recumbent scale. Metafemur with dorsoposterior edge weakly denticulate; subapically with stridulatory patch. Metatibia ventrally with sparse row of long, stiff setae. Abdominal ventrites 1-2 concave, subglabrous; posteriorly sparsely punctate; ventrite 5 almost flat, with median shallow impression, dull, microreticulate, punctate. Penis (Fig. 93b) with sides subparallel in basal 1/2, converging in apical 1/3 to subacute, weakly rounded apex; apodemes 2.7 × as long as body of penis; transfer apparatus spiniform, directed basad in repose; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Female. Length 2.50 mm. Rostrum in apical 1/2 dorsally subglabrous, with submedian and sublateral rows of punctures. Abdominal ventrite 5 flat, punctate.

Material examined.

Holotype (MZB): ARC2913 (GenBank # MK260367), N-Sulawesi Prov., Kotamobagu, Modoinding, Kakenturan, 00°46.951'N 124°30.427'E to 00°47.053'N 124°30.413'E, 1210-1228 m, beaten, 19-V-2012. Paratype (SMNK): N-Sulawesi Prov.: 1 ex, ARC2914 (GenBank # MK260368), same data as holotype.

Distribution.

N-Sulawesi Prov. (Modoinding). Elevation ca. 1210-1230 m.

Biology.

On foliage in montane forests.

Etymology.

This epithet is a Latinized adjective based on the island of Sulawesi.

Notes.

Trigonopterus sulawesiensis Riedel, sp. n. was coded as " Trigonopterus sp. 415".