Trigonopterus reticulatus Riedel

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

76. Trigonopterus reticulatus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 76a). Length 3.06 mm. Color of antennae and legs ferruginous; remainder black. Body elongate; in dorsal aspect with distinct constriction between pronotum and elytron; in profile dorsally flat. Rostrum dorsally with median ridge and pair of submedian ridges; intervening furrows with rows of erect elongate scales; epistome short, with median denticle, laterally with two denticles on the right and with one denticle on the left of rostral apex. Pronotum with disk subquadrate, anteriorly forming angulation, before converging to weak subapical constriction; densely coarsely punctate; each puncture with fine, recumbent seta; interspaces between punctures reticulate, subglabrous; median line weakly costate, impunctate. Elytra densely irregularly punctate; striae 1-2 weakly impressed; apex subtruncate; apex and base with sparse scales. Foreleg relatively long. Femora with small acute tooth; anteroventral ridges of meso- and metafemur crenate; anterior surface coarsely punctate, reticulate, each puncture with long subclavate scale. Metafemur with dorsoposterior edge weakly denticulate; subapically with stridulatory patch. Dorsal edge of tibiae denticulate. Abdominal ventrites 1-2 weakly concave, with coarse punctures bearing erect elongate scales; ventrite 5 flat, coarsely punctate, with erect scales. Penis (Fig. 76b) with sides of body subparallel, converging to subangulate, sparsely setose apex; apodemes 2.0 × as long as body of penis; transfer apparatus spiniform, 0.5 × as long as body of penis; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 1.95-3.25 mm. Female rostrum more slender, dorsally with rows of coarse punctures and weak longitudinal ridges; epistome indistinct. Female foreleg shorter.

Material examined.

Holotype (MZB): ARC3239 (EMBL # LN884979), C-Sulawesi Prov., Ampana, Tanjung Api, 00°49.855'S 121°36.493'E, 166 m, sifted, 18-V-2013. Paratypes (MZB, SMNK, ZSM): C-Sulawesi Prov.: 38 exx, ARC3240 (GenBank # MK260480), ARC3241 (GenBank # MK260481), ARC3242 (GenBank # MK260482), ARC3243 (GenBank # MK260483), same data as holotype; 12 exx, Ampana, Tanjung Api, 00°49.771'S 121°36.527'E, 137 m, sifted, 18-V-2013; 26 exx, Ampana, Tanjung Api, 00°49.687'S 121°36.560'E, 130 m, sifted, 18-V-2013.

Distribution.

SE-Sulawesi Prov. (Ampana). Elevation 130-170 m.

Biology.

In leaf litter of lowland forest.

Etymology.

This epithet is the Latin adjective reticulatus, -a, -um (reticulated) and refers to the species´ punctate-reticulate integument.

Notes.

Trigonopterus reticulatus Riedel, sp. n. was coded as " Trigonopterus sp. 494".