Trigonopterus relictus 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 : 59-60

Taxon classification Animalia Coleoptera Curculionidae

64. Trigonopterus relictus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 64a). Length 2.60 mm. Color of head and legs ferruginous, remainder black. Body in dorsal aspect with marked constriction between pronotum and elytron; with shallow constriction in profile. Rostrum with median ridge and pair of submedian ridges, intervening furrows punctate, sparsely setose; epistome with indistinct, transverse, subangulate ridge. Pronotum with distinct subapical constriction; disk coarsely punctate-rugose, sparsely setose; with pair of indistinct sublateral impressions; with distinct median ridge. Elytra with striae deeply impressed; intervals costate to carinate, ridges with transverse wrinkles; sparsely setose with small suberect setae; apex with sublateral pair of blunt teeth, with suture incised. Femora each with small tooth. Metafemur subapically with stridulatory patch. Abdominal ventrite 5 concave, at middle subglabrous, laterally punctate, sparsely setose. Penis (Fig. 64b) with sides of body constricted at middle; apex with marked median notch; subapically markedly widened, forming blade-like processes bearing setose fringes on their dorsal surface; left blade-like process slightly larger; dorsally with median sickle-shaped process protruding apicad; transfer apparatus flagelliform, slightly longer than body; apodemes 3.2 × as long as body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.08-2.60 mm. Color of body dark ferruginous to black. Body of females more compact, elytra shorter. Female rostrum dorsally in apical half with subglabrous costa, coarsely punctate; epistome simple. Female elytral apex subangulate, without pair of sublateral teeth. Female abdominal ventrite 5 flat, punctate.

Material examined.

Holotype (MZB): ARC0308 (EMBL # LM655498), E-Java Prov., Banyuwangi, Mt. Ijen, Licin, sample 4, S08°06.673', E114°14.488', 1255 m, 31-VIII-2006. Paratypes (MZB, SMNK, ZSM): E-Java Prov.: 19 exx, ARC0309 (EMBL # LM655499), same data as holotype; 33 exx, ARC0301 (EMBL # LM655491), ARC0302 (EMBL # LM655492), Banyuwangi, Mt. Ijen, Licin, sample 2, S08°05.603', E114°14.366', 1575 m, 28-VIII-2006; 12 exx, ARC0310 (EMBL # LM655500), ARC0311 (EMBL # LM655501), Banyuwangi, Mt. Ijen, Licin, sample 3, S08°06.056', E114°14.621', 1400 m, 28-VIII-2006; 2 exx, Banyuwangi, Mt. Ijen, Licin, sample 4, S08°06.673', E114°14.488', 1255 m, 28-VIII-2006; 2 exx, Banyuwangi, Mt. Ijen, Licin, sample 6, S08°07.115', E114°14.650', 1100 m, 31-VIII-2006; 9 exx, ARC2460 (EMBL # LM655798), ARC2461 (EMBL # LM655799), Krucil, Bremi, Mt. Argopuro (trail to Taman Hidup), sample 2, S07°58.478', E113°31.069', 1457 m, 10-XI-2011; 4 exx, ARC2462 (EMBL # LM655800), ARC2463 (EMBL # LM655801), Krucil, Bremi, Mt. Argopuro (trail to Taman Hidup), sample 3, S07°58.586', E113°31.345', 1628 m, 10-XI-2011; 2 exx, Krucil, Bremi, Mt. Argopuro (trail to Taman Hidup), sample 7, S07°58.449', E113°31.002', 1457 m, 11-XI-2011.

Distribution.

E-Java Prov. (Mt. Argopuro, Mt. Ijen). Elevation: 1100-1628 m.

Etymology.

This epithet is based on the Latin participle relictus (left behind), referring to the distribution of the species which inhabits an isolated patch of wet forest.

Notes.

Trigonopterus relictus Riedel, sp. n. was coded as " Trigonopterus sp. 317" by Tänzler et al. (2014).