Trigonopterus tiga Riedel

Riedel, Alexander, Taenzler, Rene, Balke, Michael, Rahmadi, Cahyo & Suhardjono, Yayuk R., 2014, Ninety-eight new species of Trigonopterus weevils from Sundaland and the Lesser Sunda Islands, ZooKeys 467, pp. 1-162 : 86

Taxon classification Animalia Coleoptera Curculionidae

93. Trigonopterus tiga Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 93a). Length 2.34 mm. Color of antennae light ferruginous, legs and sutural interval dark ferruginous; remainder black. Body subovate, in dorsal aspect with weak constriction between pronotum and elytron; with distinct constriction in profile. Rostrum with median ridge and pair of irregular submedian ridges, intervening furrows each with sparse row of mesad directed setae; epistome with transverse ridge. Pronotum coarsely punctate, laterally reticulate, submedially interspaces longitudinally rugose, with median costa; with sparse, slender, subrecumbent scales. Elytra with striae deeply impressed, with row of coarse punctures, each puncture containing one suberect bristle; intervals costate, subglabrous; suture incised, dull microreticulate, bordered by row of punctures. Femora with simple, crenate anteroventral ridge. Metafemur subapically with stridulatory patch. Abdominal ventrite 5 dull, coriaceous, at middle with shallow impression, with distinct median carina. Penis (Fig. 93b) with sides of body slightly diverging in straight line; apex subangulate, subglabrous, sparsely setose; orifice with complex sclerites; transfer apparatus compact, symmetrical, apically with large anchor-shaped sclerite; apodemes 3.3 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 1.98-2.34 mm. Female rostrum in apical half dorsally subglabrous, punctate; epistome simple. Female abdominal ventrite flat, with weak median ridge.

Material examined.

Holotype (MZB): ARC2243 (EMBL # LM655698), East Nusa Tenggara Prov., Flores Isl., Labuhan Bajo, Tebedo, sample 1, S08°29.848', E119°59.633', 525 m, 14-III-2011. Paratypes (SMNK): Flores Isl., Labuhan Bajo: 1 ex, ARC2225 (EMBL # LM655681), Roe, sample 5, S08°35.395', E120°00.383', 790 m, 13-III-2011.

Distribution.

East Nusa Tenggara Prov., Flores (Labuhan Bajo). Elevation: 525-790 m.

Etymology.

This epithet is based on the Indonesian word for “three” and is treated as a noun in apposition.

Notes.

Trigonopterus tiga Riedel, sp. n. was coded as " Trigonopterus sp. 291" by Tänzler et al. (2014).