Trigonopterus dentirostris

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Taxonavigation

Ordo: Coleoptera
Familia: Curculionidae
Genus: Trigonopterus

Name

Trigonopterus dentirostris Riedel sp. n. – Wikispecies link – ZooBank link – Pensoft Profile

Diagnostic description

Holotype, male (Fig. 22a). Length 1.65 mm. Color black; antenna and tarsi ferruginous. Body subovate; in dorsal aspect without constriction between pronotum and elytron; in profile with distinct constriction. Rostrum at base with median ridge and pair of submedian ridges; at middle with anteriorly hollowed protuberance dorsally bearing pair of denticles; between protuberance and epistome relatively flat, with sparse erect scales; epistome at middle with dorsoposteriad directed horn. Pronotum punctate-rugose, each puncture containing one narrow transparent scale; medially with indistinct ridge. Elytra with striae deeply impressed; punctures large, each containing one downcurved seta; intervals weakly costate, subglabrous. Metafemur dorsoposteriorly simple, subapically without stridulatory patch. Aedeagus (Fig. 22b). Body widening to shortly before apex; medially weakly extended; endophallus denticulate; transfer apparatus spiniform, curved; ductus ejaculatorius with weak bulbus. Intraspecific variation. Length 1.65–1.92 mm. Female rostrum dorsally even, without teeth or cavities, medially subglabrous, sublaterally punctate.

Material examined

Holotype (MZB): ARC0538 (EMBL # FN429244), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, S02°31.594', E140°30.407', 1065 m, 21-XI-2007, sifted. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani: 2 exx, ARC0544 (EMBL # FN429250), S02°31.683', E140°30.281', 960 m, 21-XI-2007, sifted; 6 exx, ARC0545 (EMBL # FN429251), Sentani, S02°31.776', E140°30.215', 945 m, 21-XI-2007, sifted; 1 ex, Sentani, S02°31.603', E140°30.434', 1095 m, 28-XI-2007, sifted; 2 exx, Sentani, 950–1450 m, 03-X-1992; 6 exx (1 marked ARC0026), Sentani, 1000 m, 23-XII-2004, sifted; 1 ex, Sentani, 1100 m, 23-XII-2004, sifted; 3 exx, ARC1690 (EMBL # HE615977), ARC1691 (EMBL # HE615978), Angkasa indah, S02°30.346', E140°42.087', 490 m, 28-VI-2010, sifted.

Distribution

Jayapura Reg. (Cyclops Mts). Elevation: 490–1095 m.

Biology

Sifted from leaf litter in montane forest.

Etymology

This epithet is based on a combination of the Latin nouns dens (tooth) and rostrum (snout) and refers to the dorsal protrusions of the rostrum.

Notes

Trigonopterus dentirostris Riedel, sp. n. was coded as “Trigonopterus sp. 49” by Riedel et al. (2010) and Tänzler et al. (2012), respectively “Trigonopterus spaw” in the EMBL/GenBank/DDBJ databases.

Original Description

• Riedel, A; Sagata, K; Surbakti, S; Rene Tänzler, ; Michael Balke, ; 2013: One hundred and one new species of Trigonopterus weevils from New Guinea ZooKeys, 280: 1-150. doi

Images

Figure 22. Trigonopterus dentirostris Riedel, sp. n., holotype; (a) Habitus (b) Aedeagus.