Trigonopterus sembilan 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 : 70-71

Taxon classification Animalia Coleoptera Curculionidae

76. Trigonopterus sembilan Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 76a). Length 1.84 mm. Color of antennae, tarsi and tibiae ferruginous; remainder black. Body subovate, in dorsal aspect and in profile with weak constriction between pronotum and elytron. Rostrum with median ridge and pair of indistinct submedian ridges, intervening furrows each with sparse row of mesad directed setae; anterior third scabrous; epistome weakly swollen, simple. Pronotum coarsely punctate, laterally reticulate, submedially interspaces longitudinally rugose, with median costa; with sparse, subrecumbent setae. Elytra with striae deeply impressed; each with row of suberect setae; intervals costate, subglabrous; intervals 1, 3, 5 more distinctly swollen; sutural interval with row of coarse punctures, intervals 3 and 5 with few scattered punctures. Femora with simple, crenate anteroventral ridge. Metafemur subapically with stridulatory patch. Metatibia apically with uncus, without premucro. Abdominal ventrite 5 coarsely punctate, with sparse recumbent setae, at middle with shallow impression. Penis (Fig. 76b) with sides of body subparallel; apex sparsely setose, with median triangular extension; endophallus with pair of elongate sclerites; transfer apparatus compact, symmetrical, with two pairs of tendons attached; laterally with pair of subparallel sclerites, markedly bent at middle, diverging to apex of endophallus; apodemes 2.1 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 1.84-2.00 mm. Female rostrum in apical half dorsally subglabrous, with submedian rows of small punctures; epistome simple. Female abdominal ventrite 5 flat.

Material examined.

Holotype (MZB): ARC1499 (EMBL # LM655597), West Nusa Tenggara Prov., Sumbawa, Tepal, Pc. Nengas, sample 2, S08°35.884', E117°08.384', 1310 m, 15-IV-2010 (MZB). Paratypes (MZB, SMNK, ZSM): West Nusa Tenggara Prov., Sumbawa: 2 exx, ARC1500 (EMBL # LM655598), ARC1501 (EMBL # LM655599), same data as holotype; 2 exx, Tepal, Pc. Nengas, sample 7, S08°35.176', E117°08.295', 1490 m, 16-IV-2010; 3 exx, ARC1519 (EMBL # LM655617), ARC1520 (EMBL # LM655618), ARC1521 (EMBL # LM655619), Batu Dulang, Mt. Batu Pasak, sample 2, S08°37.028', E117°15.783', 1305 m, 12-IV-2010.

Distribution.

West Nusa Tenggara Prov., Sumbawa (Batu Dulang, Tepal). Elevation: 1305-1490 m.

Etymology.

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

Notes.

Trigonopterus sembilan Riedel, sp. n. was coded as " Trigonopterus sp. 283".