Trigonopterus kumbang Narakusumo & Riedel

Narakusumo, Raden Pramesa, Balke, Michael & Riedel, Alexander, 2019, Seven new species of Trigonopterus Fauvel (Coleoptera, Curculionidae) from the Tanimbar Archipelago, ZooKeys 888, pp. 75-93 : 75

Trigonopterus kumbang Narakusumo & Riedel sp. nov.

Diagnostic description.

Holotype. Male ( Fig. 2a ). Length 3.12 mm. Color of antennae ferruginous, remainder black. Body subovate; in dorsal aspect and in profile with weak constriction between pronotum and elytron. Eyes dorsally approximate. Rostrum in basal 1/2 dorsally weakly swollen, with median ridge, coarsely punctate, with dense white scales; in apical half flat, subglabrous, sparsely punctate. Pronotum subglabrous, sparsely punctate with small punctures, somewhat denser and larger along basal margin. Elytra subglabrous, with sparse minute punctures, laterally and subapically striae marked by sparse rows of small punctures; stria 8 along humerus with short row of seven deeper punctures. Femora with distinct anteroventral ridge, near middle with denticle. Mesofemur and metafemur dorsally densely squamose with white scales. Metafemur with smooth dorsoposterior edge; subapically without stridulatory patch. Mesocoxa with densely squamose patch. Abdominal ventrites 1-2 concave, subglabrous, laterally with sparse white scales; ventrite 5 flat, subglabrous, microreticulate, with minute punctures, laterally with coarse punctures and sparse white scales. Penis ( Fig. 2b ) with sides subparallel, apically subangulate. Transfer apparatus simple, dentiform. Apodemes 2.6 × as along as body of penis; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 3.12-3.53 mm. Female rostrum in apical 2/3 dorsally flat, subglabrous, with minute punctures; in basal 1/3 dorsally swollen, coarsely punctate. Female abdominal ventrites 1-2 flat.

Material examined.

Holotype (MZB): MZB0002 (GenBank # MN322581), Indonesia, Maluku, Tanimbar, Yamdena Is, Lorulun, 07°48.788'S, 131°22.443'E to 07°48.82'S, 131°21.524'E, 140 m, beaten, 29-IV-2017. Paratypes (MZB, SMNK): Indonesia, Maluku, Tanimbar: 7 exx, MZB0001 (GenBank # MN322586), MZB0003 (GenBank # MN322585) same data as holotype; 1 ex, MZB0026 (GenBank # MN322582), Yamdena Is, Lorulun, Jungle Camp, 07°46.46'S, 131°20.482'E, 112m, beaten, 24-IV-2018; 3 exx, MZB0042 (GenBank # MN322584), Larat Is, Nature Reserve, 07°08.747'S, 131°49.092'E, 90 m, beaten, 25-26-IV-2018; 1 ex, MZB0019 (GenBank # MN322583), Larat Is, Nature reserve, 07°08.747'S, 131°49.092'E, 90 m, beaten, 26-IV-2018; 5 exx, Yamdena Is, Lorulun, 07°48.473'S, 131°22.266'E to 07°48.137'S, 131°21.873'E, 140 m, beaten, 02-V-2017.

Distribution.

Maluku Prov., Tanimbar (Yamdena Is, Larat Is). Elevation 90-140 m.

Biology.

On foliage in lowland forest.

Etymology.

This epithet is the Indonesian word for beetle and a noun in apposition.

Note.

This species is closely related to the undescribed Trigonopterus species 929 ( T. nasutus -group) from the D´Entrecasteaux Islands from which it differs by its smaller body size, a subglabrous side of the pronotum, and a 12.3% p-distance of its cox1 sequence.

Figures

Figure 2. Trigonopterus kumbang Narakusumo & Riedel, sp. nov., holotype a habitus b penis.