Trigonopterus mulensis, Riedel, 2022

Riedel, Alexander, 2022, Nine new species of Trigonopterus Fauvel (Coleoptera, Curculionidae) from Sundaland, ZooKeys 1124, pp. 109-130 : 109

6. Trigonopterus mulensis sp. nov.

Figs 6 , 11

Material examined.

Holotype (SMNS): ARC7272 (GenBank # OP078712 ), E-Malaysia, Sarawak, Mulu NP, 100 km SEE Miri , 200 m, 19-24-VIII-2003, sifted . Paratype (SMNK): 1 ex, same data as holotype.

Diagnostic description.

Holotype, male (Fig. 6a ). Length 2.75 mm. Color of antennae light ferruginous; legs and elytra dark ferruginous; remainder black. Body in dorsal aspect subovate, with weak constriction between pronotum and elytron; in profile dorsally convex. Rostrum with median and pair of submedian ridges; intervening furrows with rows of sparse suberect scales; epistome with median ridge. Pronotum with disk densely coarsely punctate, reticulate; each puncture containing small upcurved scale. Elytra with striae distinct, with small punctures and rows of small suberect scales; intervals costate, subglabrous, coriaceous, sutural interval with row of minute punctures. Femora with simple anteroventral ridge. Metafemur dorsally coarsely punctate; subapically with stridulatory patch. Dorsal edge of tibiae subbasally dentate, in pro- and mesotibia denticle acute, in metatibia blunt; metatibia posteriorly with dense white subclavate scales. Abdominal ventrites 1-2 forming deep common cavity, at middle weakly concave, glabrous, laterally and posteriorly with distinct rim; lateral rim of ventrite 2 in profile projec-ting dentiform; abdominal ventrite 5 at middle with round subglabrous concavity, laterally swollen, punctate. Penis (Fig. 6b ) with sides of body subparallel; with large π-shaped sclerite in apical half; apex bisinuate, with median incision; transfer apparatus small, dentiform; apodemes 1.8 X as long as body; ductus ejaculatorius without distinct bulbus.

Distribution.

Sarawak (Mulu NP). Elevation: 200 m.

Etymology.

This epithet is a Latinized adjective based on Mulu NP.

Notes.

Trigonopterus mulensis sp. nov. is coded as " Trigonopterus sp. 1248". This species belongs to the T. attenboroughi group. It is closely related to T. attenboroughi Riedel, 2014 and T. sarawakensis sp. nov., from which it can be distinguished by its dense white scales of the metatibia and 9.2-10.3% p-distance of its cox1 sequence.

Figures

Figure 6. Trigonopterus mulensis sp. nov., holotype a habitus b penis.

Figure 11. Map of other new Trigonopterus species. Prepared using GeoMapApp (www. geomapapp. org; Ryan et al. 2009); red = T. johorensis sp. nov., orange = T. lambirensis sp. nov., azure = T. linauensis sp. nov., magenta = T. microreticulatus Riedel, Trnka & Wahab sp. nov. = T. mulensis sp. nov., green = T. sarawakensis sp. nov.