Trigonopterus sumatrensis 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 : 79-80

Taxon classification Animalia Coleoptera Curculionidae

86. Trigonopterus sumatrensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 86a). Length 2.38 mm. Color of legs and antennae ferruginous, remainder dark ferruginous to black. Body subhexagonal; in dorsal aspect with marked constriction between pronotum and elytron; with distinct constriction in profile. Rostrum with median ridge and pair of submedian ridges, intervening furrows punctate; punctures each with erect narrow scale; epistome with transverse ridge. Pronotum anterolaterally angularly projecting; with distinct subapical constriction; disk coarsely punctate, each puncture containing one clavate scale; interspaces dull, microreticulate; indistinct median ridge subglabrous. Elytra with striae deeply impressed, each with row of suberect slender yellowish scales; intervals costate to carinate; intervals 1, 3, 5 more distinctly raised; interval 7 swollen subapically, laterally projecting. Profemur edentate, meso- and metafemur ventrally with little tooth. Metafemur subapically with stridulatory patch and transverse rows of denticles. Abdominal ventrite 5 flat. Penis (Fig. 86b) with body in profile markedly curved ventrad; in dorsal aspect sides subparallel; apex with short median extension rounded; trans fer apparatus flagelliform, ca. 2 × as long as body; apodemes 2.2 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.28-2.55 mm. Color of body ferruginous or black. Female rostrum dorsally with pairs of lateral and submedian furrows; epistome simple. Pronotum with anterolateral knobs projecting subrectangularly in males, more acute in females.

Material examined.

Holotype (MZB): ARC2743 (EMBL # LM655999), East Sumatra, Lampung Prov., Gisting, Sidokaton, Mt. Tanggamus, sample 2, S05°25.491', E104°41.006', 1636 m, 03-V-2012. Paratypes (MZB, SMNK, ZSM): E-Sumatra, Lampung Prov.: 23 exx, ARC0275 (EMBL # LM655466), ARC0276 (EMBL # LM655467), ARC0277 (EMBL # LM655468), ARC0278 (EMBL # LM655469), ARC0279 (EMBL # LM655470), ARC0393, Sumberjaya, Bodongjaya, Mt. Rigis, sample 3, S05°03.140', E104°26.912', 1351 m, 12-VIII-2006; 27 exx, ARC2738 (EMBL # LM655994), ARC2739 (EMBL # LM655995), ARC2740 (EMBL # LM655996), Gisting, Sidokaton, Mt. Tanggamus, sample 1, S05°25.475', E104°41.063', 1539 m, 03-V-2012; 5 exx, Gisting, Sidokaton, Mt. Tanggamus, sample 2, S05°25.491', E104°41.006', 1636 m, 03-V-2012; 8 exx, ARC2745 (EMBL # LM656001), Gisting, Sidokaton, Mt. Tanggamus, sample 4, S05°25.484', E104°41.027', 1632 m, 03-V-2012.

Distribution.

Lampung Prov. (Sumberjaya, Mt. Tanggamus). Elevation: 1351-1636 m.

Etymology.

This epithet is based on the name of Sumatra Island.

Notes.

Trigonopterus sumatrensis Riedel, sp. n. was coded as " Trigonopterus sp. 300".