Trigonopterus rugosus Riedel

Riedel, Alexander, Taenzler, Rene, Balke, Michael, Rahmadi, Cahyo & Suhardjono, Yayuk R., 2014, Ninety-eight new species of Trigonopterus weevils from Sundaland and the Lesser Sunda Islands, ZooKeys 467, pp. 1-162 : 63-64

Taxon classification Animalia Coleoptera Curculionidae

68. Trigonopterus rugosus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 68a). Length 2.53 mm. Color of antennae and legs ferruginous; head and elytral sutural interval dark ferruginous, remainder black. Body subovate, in dorsal aspect with weak constriction between pronotum and elytron; with distinct constriction in profile. Rostrum with median ridge and pair of submedian ridges, intervening furrows each with sparse row of mesad directed scales; epistome with sinuate transverse ridge. Pronotum without subapical constriction; disk with coarse irregular ridges and tubercles, with sparse, suberect scales. Elytra with striae deeply impressed, each with sparse row of slender, suberect scales; intervals costate, intervals 3 and 5 with row of punctures, others subglabrous; sutural interval basally swollen and widened laterad; suture incised, bordered by rows of suberect scales; elytral apex scabrous, margin subtruncate, with slightly incised suture, with distinct apical denticle. Femora with simple anteroventral ridge, in meso- and metafemur crenate. Metafemur subapically with stridulatory patch. Abdominal ventrite 5 dull, with T-shape ridge along base and middle, coarsely punctate, with sparse erect scales. Penis (Fig. 68b) with sides of body weakly concave; apical edge subangulate, with sparse fringe of setae; apex with median angulate extension; transfer apparatus compact; apodemes 2.0 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.36-2.53 mm. Color of elytra completely black, with ferruginous sutural interval, or entirely ferruginous. Female rostrum in apical third dorsally subglabrous, sparsely punctate; epistome simple. Female elytra ventroapically with pair of laterally flattened denticles, male elytra ventroapically simple. Female abdominal ventrite 5 medially with weak ridge.

Material examined.

Holotype (MZB): ARC0586 (EMBL # LM655522), Bali, Bedugul, Mt. Catur, sample 3, S08°15.626', E115°11.354', 1690 m, 07-XI-2007. Paratypes (MZB, SMNK, ZSM): Bali: 3 exx, ARC0587 (EMBL # LM655523), same data as holotype; 3 exx, Bedugul, Mt. Catur, sample 2, S08°15.147', E115°11.323', 1930 m, 07-XI-2007; 3 exx, ARC0571 (EMBL # LM655507), ARC0572 (EMBL # LM655508), Bedugul, Mt. Pohen (= Mt. Tapak = Mt.Keramat), sample 2, S08°16.328', E115°08.360', 1785 m, 01-XI-2007; 2 exx, ARC0573 (EMBL # LM655509), Bedugul, Mt. Pohen (= Mt. Tapak = Mt.Keramat), sample 3, S08°16.386', E115°08.402', 1735 m, 01-XI-2007; 1 ex, ARC0574 (EMBL # LM655510), Bedugul, Mt. Pohen (= Mt. Tapak = Mt.Keramat), sample 5, S08°16.526', E115°08.634', 1580 m, 01-XI-2007; 1 ex Bedugul, Mt. Pohen (= Mt. Tapak = Mt.Keramat), sample 6, S08°16.607', E115°08.773', 1460 m, 01-XI-07; 4 exx, ARC0591 (EMBL # LM655527), ARC0592 (EMBL # LM655528), ARC0593 (EMBL # LM655529), ARC0594 (EMBL # LM655530), Kintamani, Mt. Abang, sample 1, S08°17.118', E115°24.868', 1440 m, 09-XI-2007, 01-XI-2007; 6 exx, ARC2317 (EMBL # LM655770), ARC2318 (EMBL # LM655771), Angseri, Mt. Adeng, sample 3, S08°19.626', E115°08.554', 1385 m, 06-IV-2011; 5 exx, Angseri, Mt. Adeng, sample 4, S08°19.463', E115°08.537', 1535 m, 06-IV-2011; 9 exx, Angseri, Mt. Adeng, sample 5, S08°19.402', E115°08.545', 1590 m, 06-IV-2011; 5 exx, ARC2321 (EMBL # LM655774), ARC2322 (EMBL # LM655775), Angseri, Mt. Adeng, sample 6, S08°19.138', E115°08.416', 1760 m, 06-IV-2011; 1 female, Bedugul, mountain NW of botanical garden, 1400 m, 04-XII-2004 (ARC).

Distribution.

Bali (Mt. Andeng, Bedugul, Kintamani). Elevation: 1385-1785 m.

Etymology.

This epithet is based on the Latin adjective rugosus and refers to the wrinkled integument.

Notes.

Trigonopterus rugosus Riedel, sp. n. was coded as " Trigonopterus sp. 280" by Tänzler et al. (2014). The minimal p-distances of cox1 to Trigonopterus pararugosus Riedel, sp. n. is 5.6-7.2%. Morphologically no clear differences could be detected and it is assumed that both represent a pair of cryptic species.