Trigonopterus dacrycarpi 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: 21-22

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scientific name

Trigonopterus dacrycarpi Riedel

sp. n.

Taxon classification Animalia Coleoptera Curculionidae

21. Trigonopterus dacrycarpi Riedel  sp. n.

Diagnostic description.

Holotype, male (Fig. 21a). Length 2.88 mm. Color ferruginous; dorsal surface of head and pronotum dark ferruginous, center of elytron black with bronze lustre. Body in dorsal aspect with marked constriction between pronotum and elytron; in profile dorsally convex. Rostrum in apical third coarsely punctate; in basal half with median and pair of submedian ridges; intervening furrows punctate, each with sparse row of suberect setae; epistome posteriorly with transverse, angulate ridge forming distinct median denticle. Pronotum with sides subparallel, anteriorly abruptly rounded to subapical constriction; disk coarsely punctate, reticulate; each puncture containing inconspicuous seta; sublaterally each with two sparse clusters of recumbent, elongate, cream-colored scales; with distinct median ridge. Elytra with humeri swollen, laterally projecting; interval 5 in front of middle swollen, dorsally projecting; interval 6 simple; striae indistinct; intervals flat, punctate; subbasally coarsely punctate, with recumbent, yellowish, almond-shaped scales; center less densely punctate with punctures containing minute setae, interspaces polished. Anteroventral ridge of femora distinct, in meso- and metafemur forming large blunt tooth. Metafemur subapically with stridulatory patch. Dorsal edge of tibiae subbasally with angulation. Abdominal ventrite 5 flat, coarsely punctate, basally with rows of upcurved piliform scales. Penis (Fig. 21b) with sides of body subparallel; apex subangulate; transfer apparatus compact; apodemes 1.8 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.36-3.06 mm. Color of legs and elytral base ferruginous or dark ferruginous, almost black. Female body more slender. Female rostrum dorsally punctate-rugose, with median and pair of submedian subglabrous costae; epistome simple. Female elytra subovate, without swellings, lateral contour convex, humeri simple; scales near base indistinct.

Material examined.

Holotype (MZB): ARC1527 (EMBL # LM655625), West Nusa Tenggara Prov., Sumbawa, Batu Dulang, Mt. Batu Pasak, sample 3, S08°37.524', E117°15.423', 1385 m, 18-IV-2010. Paratypes (MZB, SMNK, ZSM): 2 exx, ARC1525 (EMBL # LM655623), ARC1526 (EMBL # LM655624), same data as holotype; 1 ex, Batu Dulang, Mt. Batu Pasak, sample 5, S08°37.005', E117°15.790', 1350 m, 18-IV-2010; 1 ex, ARC1532 (EMBL # LM655630), Sumbawa, Tepal, Pc. Nengas, sample 7, S08°35.176', E117°08.295', 1490 m, 16-IV-2010; 13 exx, ARC2200 (EMBL # LM655656), ARC2201 (EMBL # LM655657), ARC2202 (EMBL # LM655658), ARC2203 (EMBL # LM655659), Flores, Mt. Ranaka, sample 8, S08°37.781', E120°31.184', 1730 m, 10-III-2011; 1 ex, ARC2194 (EMBL # LM655650), Flores, Lake Ranamese, sample 3, S08°37.024', E120°33.400', 1270 m, 08-III-2011.


West Nusa Tenggara Prov., Sumbawa (Batu Dulang, Tepal), East Nusa Tenggara Prov., Flores (Mt. Ranaka, L. Ranamese). Elevation: 1270-1730 m.


This epithet is based on the name of Dacrycarpus  trees under which this weevil was usually sifted - it may however feed on other plants occurring in the same habitat.


Trigonopterus dacrycarpi  Riedel, sp. n. was coded as " Trigonopterus  sp. 329". Cox1 sequences of the populations from Sumbawa and Flores differ 7.5-9.7% p-distance, but morphologically no differences could be found.