Trigonopterus sinuatus 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 : 77-78

Taxon classification Animalia Coleoptera Curculionidae

84. Trigonopterus sinuatus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 84a). Length 2.95 mm. Color of legs and head ferruginous; pronotum and elytron black with bronze lustre. Body in dorsal aspect with marked constriction between pronotum and elytron; in profile dorsally convex. Rostrum in apical half scabrous, coarsely punctate; in basal half with median and pair of submedian ridges; intervening furrows punctate, each with sparse row of erect setae; epistome with transverse, angulate ridge forming distinct median denticle. Pronotum with sides subparallel, anterolaterally rounded to subapical constriction; disk with pair of submedian impressions, coarsely punctate, reticulate; each puncture containing inconspicuous seta; with distinct median ridge. Elytra with humeri swollen, laterally projecting; interval 5 near middle with distinct tubercle dorsally project ing; interval 6 behind middle swollen, gently projecting from lateral outline; striae indistinct; intervals flat, punctate; at base and laterally densely coarsely punctate, remainder less densely punctate. Anteroventral ridge of femora distinct, in meso- and metafemur forming large tooth. Metafemur subapically with stridulatory patch. Dorsal edge of tibiae subbasally with angulation, in mesotibia with blunt tooth. Abdominal ventrite 5 flat, coarsely punctate. Penis (Fig. 84b) with sides of body subparallel; apex subtruncate, weakly angulate; transfer apparatus compact; apodemes 1.6 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.23-3.06 mm. Female body more slender. Female rostrum dorsally subglabrous, with submedian rows of punctures and sublateral pair of furrows; epistome simple. Female elytra subovate, without tubercles, lateral contour convex.

Material examined.

Holotype (MZB): ARC1510 (EMBL # LM655608), West Nusa Tenggara Prov., Sumbawa, Batu Dulang, Mt. Batu Pasak, sample 2, S08°37.028', E117°15.783', 1305 m, 12-IV-2010. Paratypes (MZB, SMNK, ZSM): West Nusa Tenggara Prov., Sumbawa: 13 exx, ARC1509 (EMBL # LM655607), ARC1511 (EMBL # LM655609), ARC1512 (EMBL # LM655610), same data as holotype; 1 ex, Batu Dulang, Mt. Batu Pasak, sample 3, S08°37.524', E117°15.423', 1385 m, 12-IV-2010; 1 ex, Batu Dulang, Mt. Batu Pasak, sample 3, S08°37.524', E117°15.423', 1385 m, 18-IV-2010; 5 exx, ARC1493 (EMBL # LM655591), ARC1494 (EMBL # LM655592), ARC1495 (EMBL # LM655593), ARC1496 (EMBL # LM655594), Tepal, Pc. Nengas, sample 2, S08°35.884', E117°08.384', 1310 m, 15-IV-2010; 2 exx, Tepal, Pc. Nengas, sample 3, S08°35.386', E117°08.251', 1415 m, 15-IV-2010; 7 exx, Tepal, Pc. Nengas, sample 5, S08°35.740', E117°08.721', 1330 m, 16-IV-2010; 1 ex, Tepal, Pc. Nengas, sample 6, S08°35.533', E117°08.605', 1350 m, 16-IV-2010; 2 exx, Tepal, Pc. Nengas, sample 7, S08°35.176', E117°08.295', 1490 m, 16-IV-2010.

Distribution.

West Nusa Tenggara Prov., Sumbawa (Batu Dulang, Tepal). Elevation: 1305-1490 m.

Etymology.

This epithet is based on the Latin adjective sinuatus (bent) and refers to the elytral outline.

Notes.

Trigonopterus sinuatus Riedel, sp. n. was coded as " Trigonopterus sp. 333" by Tänzler et al. (2014). Cox1 sequences of the populations from Tepal and Batu Dulang differ 15.7-16.0% p-distance, but morphologically no differences could be found.