Trigonopterus acutus
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Ordo: Coleoptera
Familia: Curculionidae
Genus: Trigonopterus
Name
Trigonopterus acutus Narakusumo & Riedel, 2021 sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
Diagnostic description
Holotype. Male (Fig. 1a). Length 2.50 mm. Color of antennae and legs ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with constriction between pronotum and elytron. Rostrum dorsally with median costa, and pair submedian ridge; intervening furrows with rows of coarse punctures and small suberect scales; epistome indistinct, subglabrous with suberect setae. Pronotum with disk densely punctate; interspaces between punctures subglabrous; laterally in basal half impunctate. Elytra with striae marked by well-impressed lines and rows of punctures; intervals subglabrous, with sparse punctures. Meso- and metafemur with anteroventral ridge crenate-denticulate. Metafemur subapically with stridulatory patch. Metatibia basally subglabrous, in apical half with few long setae. Abdominal ventrites 1–2 concave, anteriorly microreticulate, partly with coarse punctures, center subglabrous; ventrite 5 flat, densely punctate, microreticulate. Penis (Fig. 1b) with sides of body converging, apex acuminate, without setae; with several endophallic sclerites, especially around the ostium; with pair of triangular sclerites reinforcing basal orifice laterally; apodemes 2.0× as long as body of penis; transfer apparatus dentiform, curved upwards; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.38–2.65 mm. Female rostrum slender, dorsally subglabrous, with rows of punctures.
Material examined
Holotype (MZB, Cole.173.053): MZB0160 (GenBank OK481878), Indonesia, C-Sulawesi, Toli-Toli, Gn. Dako, 01°02.977'N, 120°55.010'E to 01°03.210'N, 120°55.297'E, 1700–1800 m, 08–10-VII-2018, beaten. Paratypes (MZB, SMNK): Indonesia, C-Sulawesi, Toli-Toli, Gn. Dako: 5 exx, MZB0101 (GenBank OK481916), MZB0055 (GenBank OK481960), MZB0197 (GenBank OK481853), MZB0198 (GenBank OK481852), MZB0199 (GenBank OK481851), 01°02.977'N, 120°55.001'E to 01°03.210'N, 120°55.297'E, 1700–1800 m, 08–10-VII-2018, beaten; 4 exx, MZB0191 (GenBank OK481859), 01°03.782'N, 120°53.934'E to 01°02.977'N, 120°55.001'E, 1250–1750 m, 11-VII-2018, beaten.
Distribution
C-Sulawesi Prov. (Mt Dako). Elevation ca. 1700–1800 m.
Biology
On foliage in montane forest.
Etymology
The species name is the Latin adjective acutus -a -um (pointed, acute) and refers both to the elytral shape and the apex of the penis.
Notes
Trigonopterus acutus sp. nov. was coded as “Trigonopterus sp. 1207”. This species belongs to the T. tatorensis-group. It is closely related to T. daun sp. nov., from which it can be distinguished by the pointed apex of the penis.
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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