Trigonopterus johorensis, Riedel, 2022

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

2. Trigonopterus johorensis sp. nov.

Figs 2 , 11

Material examined.

Holotype (ANIC): ARC5226 (GenBank # OP078705 ), Malaysia, Johor, Kotta Tingi Falls , 01°50'N, 103°50'E, 100 m, 22-XI-1988, sifted litter.

Diagnostic description.

Holotype, male (Fig. 2a ). Length 2.88 mm. Color ferruginous. 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 punctures and rows of sparse suberect scales; epistome with indistinct subangulate ridge. Pronotum with disk densely coarsely punctate, reticulate; each puncture containing small recumbent scale. Elytra with striae distinct, with small punctures and rows of small suberect scales; intervals costate, subglabrous; elytral apex subtruncate, intervals 1-3 subapically swollen. Femora with crenate anteroventral ridge. Metafemur dorsally scabrous; subapically with stridulatory patch. Dorsal edge of tibiae subbasally dentate. Abdominal ventrites 1-2 forming common cavity, at middle flat, glabrous, laterally and posteriorly with distinct rim; lateral rim of ventrites 1 and 2 in profile projecting dentiform; abdominal ventrite 5 concave, basally with large punctures, apically with smaller punctures. Penis (Fig. 2b ) with sides of body slightly diverging; with large anchor-shaped sclerites in apical half; apex bisinuate, with median incision; transfer apparatus small, dentiform; apodemes 1.7 × as long as body; ductus ejaculatorius without distinct bulbus.

Distribution.

Malaysia (Johor). Elevation: 100 m.

Etymology.

This epithet is a Latinized adjective based on the name of the Malaysian state Johor.

Notes.

Trigonopterus johorensis sp. nov. is coded as " Trigonopterus sp. 1112". This species belongs to the T. attenboroughi group. It is closely related to T. attenboroughi Riedel, 2014, T. mulensis sp. nov., and T. sarawakensis sp. nov., from which it can be distinguished by the subtruncate elytral apex and 13.7-15.3% p-distance of its cox1 sequence.

Figures

Figure 2. Trigonopterus johorensis 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.