Trigonopterus enam 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: 31

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scientific name

Trigonopterus enam Riedel

sp. n.

Taxon classification Animalia Coleoptera Curculionidae

31. Trigonopterus enam Riedel  sp. n.

Diagnostic description.

Holotype, male (Fig. 31a). Length 2.06 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; epistome with transverse subangulate ridge. Pronotum coarsely punctate, rugose, with median costa; with sparse, subrecumbent scales. Elytra with striae deeply impressed, each with row of slender suberect scales; intervals costate, subglabrous; incised suture bordered by row of punctures. Femora with simple, crenate anteroventral ridge. Metafemur subapically with stridulatory patch. Metatibia apically with uncus, without premucro. Abdominal ventrite 5 coarsely punctate. Penis (Fig. 31b) with sides of body subparallel; apex broadly angulate, medially rounded and sparsely setose; transfer apparatus compact, symmetrical; apodemes 1.9 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.06-2.24 mm. Color of body partly ferruginous or black. Female rostrum in apical half dorsally subglabrous, punctate; epistome simple.

Material examined.

Holotype (MZB): ARC2224 (EMBL # LM655680), East Nusa Tenggara Prov., Flores Isl., Labuhan Bajo, Roe, sample 5, S08°35.395', E120°00.383', 790 m, 13-III-2011 (MZB). Paratypes (SMNK, ZSM): Flores Isl., Labuhan Bajo: 2 exx, ARC2587 (EMBL # LM655896), ARC2588 (EMBL # LM655897), Roe, sample 2, S08°36.338', E120°01.637', 965 m, 13-III-2011; 1 ex, ARC3625 (EMBL # LM656055), Roe, sample 3, S08°36.259', E120°01.539', 975 m, 13-III-2011.


East Nusa Tenggara Prov., Flores (Labuhan Bajo). Elevation: 790-965 m.


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


Trigonopterus enam  Riedel, sp. n. was coded as " Trigonopterus  sp. 295" by Tänzler et al. (2014).