Trigonopterus atuf 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 atuf Narakusumo & Riedel sp. nov.

Diagnostic description.

Holotype. Male ( Fig. 1a ). Length 2.65 mm. Color of antennae and legs ferruginous, remainder black. Body elongate subovate; profile dorsally convex; in dorsal aspect and in profile with weak constriction between pronotum and elytron. Eyes dorsally approximate. Rostrum with median carina and pair of submedian ridges, intervening furrows with suberect scales. Pronotum subglabrous, punctate. Elytra subglabrous, striae marked by rows of minute punctures and fine hairlines; along base towards humerus bordered by transverse row of deeper punctures; intervals subglabrous, with sparse minute punctures; subapically along ventral margin with row of white scales. Femora with distinct anteroventral ridge, edentate. Mesofemur and metafemur dorsally densely squamose with white scales. Metafemur with smooth dorsoposterior edge; subapically without stridulatory patch. Procoxa with patch of erect white scales. Abdominal ventrites 1-2 concave, medially subglabrous, laterally with sparse white scales; ventrite 5 with shallow impression, punctate, with sparse suberect scales. Penis ( Fig. 1b ) with sides subparallel, apex subtruncate, with sparse setae, medially with angulate extension; apodemes 3.0 × as long as body of penis; transfer apparatus complex; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.30-2.78 mm. Female rostrum subglabrous, punctate-rugose; in basal quarter with suberect scales. Female abdominal ventrite 5 flat.

Material examined.

Holotype (MZB): MZB0014 (GenBank # MN322570), Indonesia, Maluku, Tanimbar, Yamdena Is, Lorulun, 07°48.788'S, 131°22.443'E to 07°48.137'S, 131°21.873'E, 140 m, beaten, 2-V-2017. Paratypes (MZB, SMNK): Indonesia, Maluku, Tanimbar: 13 exx, MZB0012 (EMBL # MN322578) MZB0013 (GenBank # MN322580) MZB0015 (GenBank # MN322569) same data as holotype; 3 exx, MZB0017 (GenBank # MN322568), MZB0018 (GenBank # MN322567), MZB0024 (GenBank # MN322579), Selaru Is, Bangruti, 08°07.253'S, 131°02.947'E, 35 m, beaten, 22-IV-2018; 5 exx, MZB0031 (GenBank # MN322577), MZB0032 (GenBank # MN322576), MZB0040 (GenBank # MN322571), Yamdena Is, Lorulun, Jungle Camp, 07°46.46'S, 131°20.482'E, 110 m, beaten, 19-IV-2018; 1 ex, MZB0034 (GenBank # MN322574), Yamdena Is, Lorulun, Jungle track, 07°47.396'S, 131°20.849'E, 120 m, beaten, 19-20-IV-2018; 47 exx MZB0038 (GenBank # MN322573), MZB0039 (GenBank # MN322572), Yamdena Is, Lorulun, Jungle camp, 07°46.46'S, 131°20.482'E, 110 m, beaten, 24-IV-2018; 2 exx, MZB0033 (GenBank # MN322575), Yamdena Is, Lorulun, Jungle camp, 07°46.46'S, 131°20.482'E, 110 m, beaten, 27-IV-2018.

Distribution.

Maluku Prov., Tanimbar (Yamdena Is, Selaru Is). Elevation: 35-120 m.

Biology.

On foliage in lowland forest.

Etymology.

The epithet is a noun in apposition. Atuf is a mythical warrior from the folklore of the Tanimbar people who defeated the sun.

Notes.

This species is closely related to Trigonopterus species 773 from New Guinea, which differs by having a more distinct punctation and 15.1% p-distance of its cox1 sequence.

Figures

Figure 1. Trigonopterus atuf Narakusumo & Riedel, sp. nov., holotype a habitus b penis.