Trigonopterus adspersus Riedel

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

2. Trigonopterus adspersus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 2a). Length 2.30 mm. Color of antennae ferruginous; legs and basal 1/2 of elytra dark ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with moderate constriction between pronotum and elytron. Rostrum dorsally with median and pair of submedian ridges; intervening furrows with sparse, erect scales; epistome weakly swollen, simple. Pronotum with lateral edges weakly converging, with weak subapical constriction; disk with pair of distinct longitudinal impressions, lined with sparse yellow almond-shaped scales; medially broadly swollen, densely punctate with coarse punctures, with narrow subglabrous midline. Elytra punctate with small punctures; near base and at humeral angles more densely punctate with coarse punctures; striae hardly marked by hairlines; with patches of sparse yellow recumbent scales. Femora dentate, with acute tooth; anteroventral ridges crenate. Metafemur dorsally denticulate; subapically with stridulatory patch. Dorsoposterior edge of tibiae subbasally denticulate. Metatibia weakly curved. Abdominal ventrites 1-2 concave, subglabrous, with sparse scales; ventrite 5 concave, with sparse punctures. Penis (Fig. 2b) with sides of body subparallel, apex subtruncate, with few short setae; apodemes 1.6 × as long as body of penis; transfer apparatus flagelliform, subequal to length of body of penis; ductus ejaculatorius without distinct bulbus.

Material examined.

Holotype (MZB): ARC3146 (EMBL # LN884965), SE-Sulawesi Prov., Kendari, road from Wawotobi to Lasolo, 03°44.142'S 122°13.670'E, 482 m, sifted, 17-IV-2013.

Distribution.

SE-Sulawesi Prov. (Kendari). Elevation ca. 480 m.

Biology.

In leaf litter of lowland forest.

Etymology.

This epithet is based on the Latin participle adspersus (sprinkled, strewn on) and refers to the species´ integument with scattered scales.

Notes.

Trigonopterus adspersus Riedel, sp. n. was coded as " Trigonopterus sp. 489".