Trigonopterus duabelas 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 : 28-29

Taxon classification Animalia Coleoptera Curculionidae

28. Trigonopterus duabelas Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 28a). Length 2.80 mm. Color of tarsi and antenna ferruginous, remainder black. Body elongate; in dorsal aspect with marked constriction between pronotum and elytron; with distinct constriction in profile. Rostrum dorsally microreticulate, dull; with median ridge and pair of indistinct submedian ridges; intervening furrows each with row of erect scales; epistome with transverse, angulate ridge forming distinct median denticle. Pronotum ante rolaterally angularly projecting; with distinct subapical constriction; disk coarsely punctate, punctures each with one erect seta; interspaces microreticulate; with median ridge. Elytra with striae deeply impressed, each with row of suberect scales; intervals irregularly costate, partly tuberculate, nude, weakly microreticulate; interval 7 swollen subapically, laterally weakly projecting; sutural interval subapically with minute tooth. Femora edentate. Metafemur subapically with stridulatory patch and transverse ridge. Abdominal ventrite 5 densely punctate, setose, in apical half with impression. Penis (Fig. 28b) in profile markedly curved; in dorsal aspect body slender, sides subparallel; ventral edge of apex retracted, with median extension small, dentiform; transfer apparatus flagelliform, 1.9 × as long as body; apodemes 2.2 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.2-2.8 mm. Color of legs entirely ferruginous in specimens from Mt. Slamet; sutural interval ferruginous or black. Female rostrum dorsally with pairs of lateral and submedian furrows; epistome simple. Elytral interval 3 more or less swollen. Female abdominal ventrite 5 flat. Penis with flagelliform transfer apparatus 1.7-1.9 × longer than body.

Material examined.

Holotype (MZB): ARC0284 (EMBL # LM655474), C-Java Prov., N slopes of Dieng figau, Petungkriyono, Mt. Deles, sample 1, S07°08.221', E109°43.599', 1505 m, 24-VIII-2006. Paratypes (MZB, SMNK): C-Java Prov.: ARC0283 (EMBL # LM655473), same data as holotype; 2 exx, ARC2491 (EMBL # LM655828), ARC2492 (EMBL # LM655829), Mt. Slamet, Guci, sample 2, S07°13.255', E109°11.005', 1858 m, 26-XI-2011; 4 exx, ARC2493 (EMBL # LM655830), ARC2494 (EMBL # LM655831), ARC2495 (EMBL # LM655832), Mt. Slamet, Guci, sample 6, S07°11.983', E109°10.556', 1671 m, 27-XI-2011; 1 ex, Mt. Slamet, Guci, sample 7, S07°11.906', E109°10.486', 1653 m, 27-XI-2011.

Distribution.

C-Java Prov. (Dieng, Mt. Slamet). Elevation: 1505-1858 m.

Etymology.

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

Notes.

Trigonopterus duabelas Riedel, sp. n. was coded as " Trigonopterus sp. 444". Cox1 sequences of the populations from Dieng and Mt. Slamet differ 4.6-5.4 % p-distance, but no distinct morphological differences could be found.