Trigonopterus incendium Riedel

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

32. Trigonopterus incendium Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 32a). Length 1.83 mm. Color of antennae, legs and head ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with weak constriction between pronotum and elytron. Rostrum in front of eye with distinct lateral constriction; dorsally with median and pair of submedian, somewhat irregular ridges; intervening furrows with sparse rows of suberect setae; epistome short, posteriorly with transverse ridge. Pronotum with disk densely punctate with coarse punctures; interspaces between punctures microreticulate; each puncture with fine, recumbent seta; median line costate. Elytra with striae impressed, marked by rows of distinct punctures; punctures each with short, subrecumbent seta; sutural interval punctate, other intervals subglabrous. Femora with small, blunt tooth; anterior surface coarsely rugose-punctate, microgranulate, with sparse recumbent piliform scales. Metafemur subapically with stridulatory patch. Abdominal ventrite 1 medially deeply impressed, behind metacoxa with angular knob; ventrite 5 at middle with distinct depression, coarsely punctate, microgranulate. Penis (Fig. 32b) with sides of body subparallel, slightly diverging; apex subtruncate with short median extension; apodemes 2.0 × as long as body of penis; endophallus containing hyaline Y-shaped structure; transfer apparatus short flagelliform, 0.8 × length of body of penis; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 1.63-1.89 mm. Female rostrum with ridges less distinct, ending in apical 1/2; epistome indistinct. Female abdominal ventrite 5 flat.

Material examined.

Holotype (MZB): ARC3247 (EMBL # LN884980), 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, Ampana, Tanjung Api: 12 exx, ARC3248 (GenBank # MK260411), ARC3249 (GenBank # MK260412), same data as holotype; 13 exx, ARC3250 (GenBank # MK260410), 00°49.771'S 121°36.527'E, 137 m, sifted, 18-V-2013; 29 exx, 00°49.687'S 121°36.560'E, 130 m, sifted, 18-V-2013.

Distribution.

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

Biology.

In leaf litter of lowland forest.

Etymology.

This epithet is the Latin noun incendium (burning, arson) in apposition and refers to the type locality Tanjung Api (Cape of Fire) with flames of natural gas.

Notes.

Trigonopterus incendium Riedel, sp. n. was coded as " Trigonopterus sp. 471".