Trigonopterus selayarensis Riedel

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

88. Trigonopterus selayarensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 88a). Length 1.98 mm. Color of antennae ferruginous; legs and head dark ferruginous; remainder black. Body subrotund; in dorsal aspect with distinct constriction between pronotum and elytron, in profile with weaker constriction. Rostrum dorsally with distinct median ridge and pair of sublateral ridges; with sparse rows of suberect setae; epistome short, sparsely punctate, posteriorly with transverse, angulate ridge. Pronotum with subapical constriction; disk coarsely punctate, scabrous; each puncture with erect, curved seta. Elytra with striae deeply impressed; with rows of erect, weakly clavate, curved scales; intervals carinate, subglabrous, microreticulate. Meso- and metafemur with minute blunt denticle, profemur edentate. Metafemur subapically without stridulatory patch. Abdominal ventrite 5 flat, microreticulate, punctate, sparsely setose with long setae. Penis (Fig. 88b) hardly asymmetrical; tip medially extended; basal orifice ventrally simple; apodemes subequal to body of penis (1.0 ×); ductus ejaculatorius with distinct bulbus. Intraspecific variation. Length 1.68-2.14 mm. Body subrotund in larger specimens to subovate in smaller specimens. Female rostrum more slender, dorsally punctate-rugose, epistome indistinct.

Material examined.

Holotype (MZB): ARC3186 (GenBank # MK260407), S-Sulawesi Prov., Selayar Is, Pagarangan, 06°18.334'S 120°30.794'E, 545 m, sifted, 24-IV-2013. Paratypes (MZB, SMNK): 7 exx, ARC3185 (GenBank # MK260409), ARC3187 (GenBank # MK260408), same data as holotype.

Distribution.

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

Biology.

In leaf litter of lowland forest.

Etymology.

This epithet is a Latinized adjective based on the type locality Selayar Island.

Notes.

Trigonopterus selayarensis Riedel, sp. n. was coded as " Trigonopterus sp. 467".