Trigonopterus asper 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 : 13

Taxon classification Animalia Coleoptera Curculionidae

10. Trigonopterus asper Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 10a). Length 2.60 mm. Color of legs and head ferruginous, remainder black. Body elongate; in dorsal aspect with marked constriction between pronotum and elytron; with distinct constriction in profile. Rostrum coarsely rugose-punctate, with median ridge and pair of irregular submedian ridges; epistome with indistinct, transverse, subangulate ridge. Pronotum with distinct subapical constriction; disk scabrous, punctures each with one erect seta; with median ridge. Elytra with striae deeply impressed, each with row of stout suberect bristles; intervals tuberculate, almost nude; sutural interval apically extended; interval 7 swollen subapically, laterally weakly projecting. Femora edentate. Metafemur subapically with stridulatory patch. Abdominal ventrite 5 flat, densely punctate, setose. Penis (Fig. 10b) with body flattened, in profile markedly curved; in dorsal aspect sides subparallel; apex with median, subtriangular extension; transfer apparatus flagelliform, 1.5 × longer than body; apodemes 2.6 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.48-2.60 mm. Female rostrum dorsally with pairs of lateral and submedian furrows; epistome simple.

Material examined.

Holotype (MZB): ARC2520 (EMBL # LM655857), West Java Prov., Bandung, Lembang, Pangli, Mt. Bukittinggul, sample 3, S06°48.807', E107°43.897', 1983 m, 03-XII-2011. Paratypes (MZB, SMNK, ZSM): Bandung, Lembang, Pangli, Mt. Bukittinggul: 10 exx, ARC2521 (EMBL # LM655858), ARC3639 (EMBL # LM656061), same data as holotype; 4 exx, sample 2, S06°48.845', E107°44.074', 1898 m, 03-XII-2011; 10 exx, ARC2522 (EMBL # LM655859), sample 4, S06°48.660', E107°43.722', 2185 m, 03-XII-2011.

Distribution.

W-Java Prov. (Mt. Bukittinggul). Elevation: 1983-2185 m.

Etymology.

This epithet is based on the Latin adjective asper (rough, coarse) and refers to its body sculpture.

Notes.

Trigonopterus asper Riedel, sp. n. was coded as " Trigonopterus sp. 359". It is closely related to Trigonopterus variolosus Riedel, sp. n. from which it can be separated by a larger penis with a longer flagellum. The minimal p-distance between both species is 9.5%.