Trigonopterus cahyoi 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: 18-19

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Trigonopterus cahyoi Riedel

sp. n.

Taxon classification Animalia Coleoptera Curculionidae

17. Trigonopterus cahyoi Riedel  sp. n.

Diagnostic description.

Holotype, male (Fig. 17a). Length 3.03 mm. Color of legs and head ferruginous, remainder black. Body elongate; in dorsal aspect with marked constriction between pronotum and elytron; in profile dorsally with indistinct constriction. Rostrum with median carina terminating on forehead; with pair of submedian ridges; intervening furrows each with row of erect, piliform scales; anteriorly behind epistome ridges shortened; epistome with transverse, angulate ridge forming distinct median denticle. Pronotum anterolaterally subangularly projecting; with indistinct subapical constriction; disk coarsely rugose-punctate; each puncture containing suberect piliform scale; with median ridge. Elytra with striae deeply impressed; each with row of suberect piliform scales; intervals costate, ridges transversely rugose; costa of interval 2 shortened at base; interval 7 swollen subapically, laterally weakly projecting; apex extended ventrad, beak-shaped. Meso- and metafemur with anteroventral ridge forming indistinct blunt tooth. Metafemur subapically with stridulatory patch and transverse row of denticles. Abdominal ventrite 5 subapically with shallow pit. Penis (Fig. 17b) with body in profile moderately curved ventrad; in dorsal aspect sides subparallel in basal half, anteriorly gently diverging; apex medially with small rounded extension; apodemes 2.0 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.05-3.19 mm. Color of elytra completely black or base and sutural interval ferruginous. Body of females slender; males slightly wider, especially between humeri. Female rostrum dorsally with pair of lateral furrows, pair of submedian furrows continued apicad by coarse punctures; epistome simple. Female abdominal ventrite 5 flat.

Material examined.

Holotype (MZB): ARC2678 (EMBL # LM655936), West Java, Prov., Sumedang, Sukajadi, Mt. Cakrabuana, sample 6, S07°01.943', E108°08.029', 1593 m, 20-IV-2012. Paratypes (MZB, SMNK, ZSM): W-Java Prov.: 9 exx, Sumedang, Sukajadi, Mt. Cakrabuana, sample 4, S07°01.734', E108°08.059', 1530 m, 19-IV-2012; 8 exx, same data as holotype; 59 exx, ARC0155, ARC0172, ARC0193 (EMBL # LM655417), ARC0194 (EMBL # LM655418), ARC0195 (EMBL # LM655419), Ciamis, Mt. Sawal, Batu Cakra, sample 1, S07°14.920', E108°15.762', 990 m, 01-X-2005 (MZB); 13 exx, sample 3, S07°14.900', E108°15.893', 940 m, 01-X-2005; 11 exx, Ciamis, Mt. Sawal, Blok Cireong, sample 2, S07°14.127', E108°15.568', 1120 m, 01-X-2005; 3 exx, ARC2504 (EMBL # LM655841), Ciamis, Mt. Sawal, Panjalu, Tembong, sample 1, S07°10.528', E108°16.423', 1314 m, 29-XI-2011; 8 exx, ARC2508 (EMBL # LM655845), Ciamis, Mt. Sawal, Panjalu, Tembong, sample 3, S07°11.102', E108°16.310', 1569 m, 29-XI-2011.


W-Java Prov. (Mt. Cakrabuana, Mt. Sawal). Elevation: 990-1593 m.


The species is named for arachnologist Cahyo Rahmadi, who collected the first specimens of this species. The epithet is a noun in the genitive case.


Trigonopterus cahyoi  Riedel, sp. n. was coded as " Trigonopterus  sp. 320" by Tänzler et al. (2014).