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

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Trigonopterus duabelas Riedel

sp. n.

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.


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


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


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.