Trigonopterus arcanus
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Ordo: Coleoptera
Familia: Curculionidae
Genus: Trigonopterus
Name
Trigonopterus arcanus Narakusumo & Riedel, 2021 sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
Diagnostic description
Holotype, male (Fig. 3a). Length 2.40 mm. Color of antennae ferruginous; remainder black. Body subovate; in dorsal aspect with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum dorsally with median ridge and pair of submedian ridges; intervening furrows with sparse rows of narrow, recumbent scales; epistome in apical 1/4 indistinct, subglabrous, with sparse setae. Pronotum with disk punctate, each puncture containing short seta; median line impunctate; interspaces subglabrous. Elytra with striae marked by rows of small punctures; intervals subglabrous; near base with few slightly larger punctures. Femora edentate; anteroventral ridge weakly crenate, ending in apical 1/3; anterior surface densely punctate, each puncture with narrow recumbent scale. Metafemur dorsally rounded, subapically with extensive stridulatory patch. Metatibia with dorsal edge weakly denticulate. Abdominal ventrites 1–2 weakly concave, subglabrous; ventrite 5 with dense coarse punctures, covered with suberect scales. Penis (Fig. 3b) with body subparallel, apex asymmetrical with subangulate extension, with few setae; apodemes 2.0× as long as body of penis; transfer apparatus complex, asymmetrical, with subrotund capsule; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.13–2.80 mm. Female rostrum dorsally polished, with submedian and sublateral rows of punctures. Female abdominal ventrite 1 weakly concave with sparse minute punctures. Female abdominal ventrite 5 flat, medially weakly convex, punctate, with suberect scales.
Material examined
Holotype (MZB, Cole.173.055): MZB0060 (GenBank OK481955), Indonesia, C-Sulawesi, Toli-Toli, Gn. Dako, 01°3.574'N, 120°54.0322'E to 01°03.180'N, 120°54.607'E 1100–1200 m, 06-VII-2018, beaten. Paratype (MZB, SMNK): Indonesia, C-Sulawesi, Toli-Toli, Gn. Dako: 2 exx, same data as holotype; 3 exx, MZB0195 (GenBank OK481855), 01°04.181'N, 120°53.565'E to 01°03.967'N, 120°53.692'E, 720–830 m, 01-VII-2018, beaten; 3 exx, 01°03.574'N, 120°54.032'E to 01°03.512'N, 120°54.054'E, 1100–1200 m, 06-VII-2018, beaten; 11 exx, 01°03.782'N, 120°53.934'E to 01°03.574'N, 120°54.032'E, 970–1100 m, 06-VII-2018, beaten; 3 exx, 01°03.782N, 120°53.934'E to 01°03.574N, 120°54.032'E, 970–1140 m, 06-VII-2018, beaten; 2 exx, 01°03.782'N, 120°53.934'E, 970 m, 04-VII-2018, beaten; 2 exx, MZB0281 (GenBank OK481775), 01°03.782'N, 120°53.934'E, 970 m, 07-VII-2018, beaten; 3 exx, 01°03.967'N, 120°53.692'E to 01°03.782'N, 120°53.934'E, 830–970 m, 01-VII-2018, beaten; 1 ex, MZB0192 (GenBank OK481858), 01°04.181'N, 120°53.565'E to 01°03.967'N, 120°53.692'E, 835–970 m, 01-VII-2018, beaten; 7 exx, 01°03.967'N, 120°53.692'E to 01°03.782'N, 120°53.934'E, 830–970 m, 05-VII-2018, beaten; 7 exx, MZB0282 (GenBank OK481774), 01°03.967'N, 120°53.692'E to 01°03.782'N, 120°53.934'E, 830–970 m, 03-VII-2018, beaten; 3 exx, 01°03.574'N, 120°54.032'E to 01°03.157'N, 120°54.195'E, 1100–1120 m, 06-VII-2018, beaten; 9 exx, MZB0058 (GenBank OK481957), MZB0090 (GenBank OK481927), MZB0196 (GenBank OK481854), 01°03.412'N, 120°54.126'E to 01°03.241'N, 120°54.328'E, 1200–1300 m, 07-VII-2018, beaten; 3 exx, MZB0061 (GenBank OK481954), MZB0091 (GenBank OK481926), MZB0280 (GenBank OK481776), 01°03.697N, 120°53.991'E, 1030 m, 06-VII-2018, beaten; 13 exx, 01°03.697'N, 120°53.991'E, 1030 m, 06-VII-2018, sifted; 1 ex, 01°03.157'N, 120°54.195'E, 1120 m, 06-VII-2018, sifted; 1 ex, MZB0283 (GenBank OK481773), 01°03.157'N, 120°54.195'E, 1120 m, 13-VII-2018, sifted; 9 exx, 01°03.574'N, 120°54.032'E to 01°03.181'N, 120°54.607'E, 1100–1400 m, 07-VII-2018, beaten; 5 exx, 01°03.014'N, 120°54.607'E to01°02.977'N, 120°55.009'E, 1400–1750 m, 01-VII-2018, beaten.
Distribution
C-Sulawesi Prov. (Mt Dako). Elevation 830–1400 m.
Biology
On foliage in montane forest.
Etymology
This epithet is based on the Latin adjective arcanus -a, -um (hidden) and it refers to its close similarity to its sibling species T. ovatulus Riedel and T. pseudovatulus Riedel.
Notes
Trigonopterus arcanus sp. nov. was coded as “Trigonopterus sp. 1187”. The species belongs to the T. ovatulus-group. It is closely related to T. pseudovatulus Riedel from which it can be distinguished by the absence of a metatibial supra-uncal tooth. Furthermore, it differs by 12.7–13.8% p-distances of its cox1 sequence.
Original Description
- Narakusumo, R; Riedel, A; 2021: Twenty-eight new species of Trigonopterus Fauvel (Coleoptera, Curculionidae) from Central Sulawesi ZooKeys, 1065: 29-79. doi
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