Trigonopterus laratensis
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Ordo: Coleoptera
Familia: Curculionidae
Genus: Trigonopterus
Name
Trigonopterus laratensis Narakusumo & Riedel sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
Diagnostic description
Holotype: Male (Fig. 3a). Length 2.53 mm. Color of head, femora and tibiae ferruginous; remainder black. Body subovate; in dorsal aspect almost without constriction between pronotum and elytron; profile dorsally convex. Rostrum in basal 1/2 with median costa and submedian ridges, intervening furrows with sparse, suberect scales. Pronotum subglabrous, sparsely punctate with small to minute punctures; anterolaterally with coarse punctures. Elytra subglabrous, punctate with minute punctures; striae marked by faint hairlines. Femora subglabrous weakly microreticulate, with minute punctures; with anteroventral ridge distinct, simple. Meso- and metafemur dorsally squamose with white scales. Mesotibia basally rounded; subapically with uncus and larger premucro. Metafemur subapically simple, without stridulatory patch; with uncus, without premucro. Abdominal ventrites 1–2 medially concave, subglabrous, microreticulate; ventrite 2 posteriorly projecting and forming edge; ventrite 5 almost flat, weakly concave, microreticulate. Penis (Fig. 3b) with side subparallel; apex symmetrical, with median triangular extension; transfer apparatus dentiform, apically bordered by pair of L-shaped sclerites; apodemes 3.0× as long as body of penis; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.48–2.53 mm. Female rostrum dorsally subglabrous, punctate; in basal 1/3 with median and submedian ridges. Female mesotibia subapically with uncus and minute premucro. Female abdominal ventrites 1–2 flat, with sparse punctures; ventrite 5 flat, subglabrous.
Material examined
Holotype (MZB): MZB0022 (GenBank # MN322587), Indonesia, Maluku, Tanimbar, Larat Is, Nature reserve, 07°08.747'S, 131°49.092'E, 85 m, beaten, 25–26-IV-2018. Paratype (SMNK): Indonesia, Maluku, Tanimbar: 1 ex, MZB0027 (GenBank # MN322588), Yamdena Is, Lorulun, Jungle Camp, 07°46.46'S, 131°20.482'E, 110 m, beaten, 24-IV-2018.
Distribution
Maluku Prov., Tanimbar (Yamdena Is, Larat Is). Elevation: 85–110 m.
Biology
On foliage in lowland forest.
Etymology
This epithet is based on the type locality Larat Island.
Notes
This species belongs to the T. politus group. It is most closely related to a clade comprising T. allotopus Riedel, T. pseudallotopus Riedel, and some undescribed species from New Guinea, but it has no close relationship to the clade of Australian species.
Original Description
- Narakusumo, R; Balke, M; Riedel, A; 2019: Seven new species of Trigonopterus Fauvel (Coleoptera, Curculionidae) from the Tanimbar Archipelago ZooKeys, 888: 75-93. doi
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