Trigonopterus vulcanicus 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 : 90-91

Taxon classification Animalia Coleoptera Curculionidae

98. Trigonopterus vulcanicus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 98a). Length 3.76 mm. Color of legs and antennae ferruginous, remainder black. Body elongate; in dorsal aspect with marked constriction between pronotum and elytron; in profile dorsally evenly convex. Rostrum with median carina terminating on forehead and pair of submedian ridges; intervening furrows each with row of erect piliform scales; epistome with transverse, angulate ridge forming indistinct median denticle. Pronotum anterolaterally markedly projecting, rounded; with subapical constriction; disk coarsely punctate, partly scabrous, interspaces microreticulate; each puncture containing small seta; disk with pair of submedian, shallow impressions. Elytra with striae indistinct; intervals flat; punctation dense, confused, near basal margin punctures partly confluent; each puncture containing small recumbent seta; interspaces dull, coriaceous, microreticulate; interval 7 swollen subapically, laterally weakly projecting; sutural interval at apex forming median, apically bifid protrusion. Anteroventral ridge of femora forming blunt tooth. Metafemur subapically with stridulatory patch and transverse row of denticles. Abdominal ventrite 5 flat, coarsely punctate, sparsely setose with long erect setae. Penis (Fig. 98b) with body in profile markedly curved ventrad; sides of body subparallel; apex broadly rounded; transfer apparatus minute; apodemes slightly shorter than body; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.68-3.88 mm. Integument of males dull, microreticulate; females with punctures sparser and smaller, interspaces polished. Female rostrum dorsally with glabrous median costa and pair of submedian costae separated by punctate furrow; epistome simple. Female elytra with lateral contour from humeri more evenly convex to apex; suture extended into acute process. Penis with body relatively short and robust in Western population; rather slender, long, basally markedly curved in Central population; intermediate between these two in Eastern population.

Material examined.

Holotype (MZB): ARC2514 (EMBL # LM655851), West Java Prov., Bandung, Lembang, Pangli, Mt. Bukittinggul, sample 1, S06°48.810', E107°44.216', 1753 m, 03-XII-2011. Paratypes (MZB, SMNK, ZSM): 2 exx, ARC0254 (EMBL # LM655446), ARC0255 (EMBL # LM655447), W-Java Prov., Telaga Warna, between Puncak and Cipanas, S06°42.253', E106°59.755', sample 1, 1584 m, 06-VIII-2006; 1 ex, ARC2662 (EMBL # LM655920), W-Java Prov., Sukabumi, Mt. Gede, Cisaat, Situ Gunung, sample 3, S06°48.628', E106°56.077', 1462 m, 16-IV-2012; 1 ex, ARC2667 (EMBL # LM655925), W-Java Prov., Sukabumi, Mt. Gede, Cisaat, Situ Gunung, sample 7, under Lithocarpus sp., S06°48.377', E106°56.183', 1637 m, 16-IV-2012; 3 exx, ARC2515 (EMBL # LM655852), same data as holotype; 4 exx, ARC2518 (EMBL # LM655855), ARC2519 (EMBL # LM655856), W-Java Prov., Bandung, Lembang, Pangli, Mt. Bukittinggul, sample 2, S06°48.845', E107°44.074', 1898 m, 03-XII-2011; 7 exx, ARC2706 (EMBL # LM655962), ARC2707 (EMBL # LM655963), ARC2708 (EMBL # LM655964), W-Java Prov., Garut, Cikajang, Mt. Payung, sample 2, S07°25.268', E107°48.492', 1250 m, 26-IV-2012; 6 exx, ARC2712 (EMBL # LM655968), W-Java Prov., Garut, Cikajang, Mt. Payung, sample 3, S07°25.320', E107°48.259', 1560 m, 26-IV-2012; 3 exx, ARC0205 (EMBL # LM655427), ARC0206 (EMBL # LM655428), ARC0207 (EMBL # LM655429), W-Java Prov., Garut, Cilawu, Mt. Cikuray, sample 1, S07°18.578', E107°52.622', 1648 m, 24-IX-2005; 3 exx, ARC0161, ARC0187 (EMBL # LM655412), W-Java Prov., Garut, Cilawu, Mt. Cikuray, sample 2, S07°18.840', E107°52.512', 1800 m, 24-IX-2005; 7 exx, ARC2720 (EMBL # LM655976), ARC2721 (EMBL # LM655977), ARC2722 (EMBL # LM655978), W-Java Prov., Garut, Wanaraja, Talagabodas, sample 2, S07°11.966', E108°03.984', 1719 m, 27-IV-2012; 1 ex, ARC2723 (EMBL # LM655979), W-Java Prov., Garut, Wanaraja, Talagabodas, sample 1, S07°12.511', E108°03.554', 1741 m, 27-IV-2012; 6 exx, ARC0162, ARC0173, ARC0199 (EMBL # LM655421), ARC0200 (EMBL # LM655422), W-Java Prov., Ciamis, Mt. Sawal, Batu Cakra, S07°14.920', E108°15.762', 990 m, 01-X-2005; 1 ex, W-Java Prov., Ciamis, Mt. Sawal, Blok Cireong, sample 2, S07°14.127', E108°15.568', 1120 m, 01-X-2005; 9 exx, ARC0293 (EMBL # LM655483), ARC0294 (EMBL # LM655484), ARC0295 (EMBL # LM655485), C-Java Prov., N slopes of Dieng figau, Petungkriyono, mountain N Tinalum, sample 1, S07°06.418', E109°44.514', 1115 m, 22-VIII-2006; 6 exx, ARC0298 (EMBL # LM655488), ARC0299 (EMBL # LM655489), ARC0300 (EMBL # LM655490), C-Java Prov., N slopes of Dieng figau, Petungkriyono, Mt. Deles, sample 3, S07°08.225', E109°43.555', 1495 m, 24-VIII-2006; 7 exx, C-Java Prov., N slopes of Dieng figau, Petungkriyono, Mt. Deles, sample 1, S07°08.221', E109°43.599', 1505 m, 24-VIII-2006; 2 exx, C-Java, Mt. Slamet, Guci, sample 5, S07°11.953', E109°10.497', 1620 m, 27-XI-2011; 6 exx, ARC2499 (EMBL # LM655836), ARC2500 (EMBL # LM655837), Central Java Prov., Mt. Slamet, Guci, sample 6, S07°11.983', E109°10.556', 1671 m, 27-XI-2011; 9 exx, ARC2501 (EMBL # LM655838), ARC2502 (EMBL # LM655839), C-Java Prov., Mt. Slamet, Guci, sample 4, S07°12.304', E109°10.450', 1406 m, 27-XI-2011.

Distribution.

W-Java Prov. (Mt. Gede N.P., Mt. Bukittinggul, Mt. Cikuray, Mt. Payung, Talagabodas, Mt. Sawal), C-Java Prov. (Dieng, Mt. Slamet). Elevation: 990-1898 m.

Etymology.

This epithet is based on the Latin adjective vulcanicus and refers to its presence on volcanic mountains.

Notes.

Trigonopterus vulcanicus Riedel, sp. n. was coded as " Trigonopterus sp. 313". This species is divided into three populations that exhibit slightly different shapes of the penis; however, they hardly justify recognition as separate species. The western population is found at Mt. Gede; the central population at Mt. Bukittinggul, Mt. Cikuray, Mt. Payung and Talagabodas; and the Eastern population at Mt. Sawal, Dieng, and Mt. Slamet.