Trigonopterus costipennis 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: 19

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Trigonopterus costipennis Riedel

sp. n.

Taxon classification Animalia Coleoptera Curculionidae

18. Trigonopterus costipennis Riedel  sp. n.

Diagnostic description.

Holotype, male (Fig. 18a). Length 2.32 mm. Color of tarsi and antennae ferruginous; remainder black. Body elongate subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum with median ridge and pair of submedian ridges, anteriorly behind epistome scabrous; with sparse rows of suberect setae; epistome with transverse, angulate ridge. Pronotum with subapical constriction; disk coarsely punctate, scabrous; each puncture containing suberect, weakly clavate scale inserting at posterior rim. Elytra with striae marked by deep punctures; in front of each puncture with piliform, erect scale; intervals costate, subglabrous, weakly microreticulate; sutural interval and interval 7 swollen subapically, projecting from outline. Femora edentate. Metafemur subapically without stridulatory patch. Dorsal edge of meso- and metatibia denticulate. Abdominal ventrite 5 flat, microreticulate, almost nude, with few short setae. Penis (Fig. 18b) with apex asymmetrical, tip slightly upcurved and extended to the left; apical extension long; basal orifice ventrally simple; apodemes short, 0.5 × as long as body; ductus ejaculatorius with bulbus. Intraspecific variation. Length 2.04-2.51 mm. Female rostrum dorsally in apical half subglabrous, densely punctate; epistome simple.

Material examined.

Holotype (MZB): ARC2470 (EMBL # LM655807), E-Java, Mt. Semeru, road Senduro - Ranupani, sample 4, S08°01.801', E112°59.931', 1430 m, 13-XI-2011. Paratypes (MZB, SMNK, ZSM): E-Java Prov.: 2 exx, ARC2469 (EMBL # LM655806), ARC2472 (EMBL # LM655809), same data as holotype; 2 exx, ARC2471 (EMBL # LM655808), Mt. Semeru, road Senduro - Ranupani, sample 3, S08°02.052', E112°59.356', 1572 m, 13-XI-2011; 6 exx, Mt. Semeru, road Senduro - Ranupani, sample 4, S08°01.801', E112°59.931', 1430 m, 13-XI-2011; 1 ex, Mt. Semeru, road Senduro - Ranupani, sample 5, S08°01.952', E113°00.379', 1345 m, 13-XI-2011; 18 exx, ARC2480 (EMBL # LM655817), ARC2481 (EMBL # LM655818), Kediri, Besuki, Mt. Wilis, sample 1, S07°51.785', E111°50.188', 1379 m, 21-XI-2011; 12 exx, Kediri, Besuki, Mt. Wilis, sample 4, S07°51.852', E111°50.185', 1388 m, 22-XI-2011; 4 exx, ARC2489 (EMBL # LM655826), ARC2490 (EMBL # LM655827), Kediri, Besuki, Mt. Wilis, sample 5, S07°51.650', E111°50.174', 1485 m, 22-XI-2011; 10 exx, Kediri, Besuki, Mt. Wilis, sample 6, S07°51.709', E111°50.100', 1409 m, 22-XI-2011; 15 exx, Kediri, Besuki, Mt. Wilis, sample 7, S07°51.638', E111°50.010', 1432 m, 22-XI-2011.


E-Java Prov. (Mt. Semeru, Mt. Wilis). Elevation: 1345-1572 m.


This epithet is a combination of the Latin nouns costa (rib, ridge) and penna (elytron) refers to its elytral sculpture.


Trigonopterus costipennis  Riedel, sp. n. was coded as " Trigonopterus  sp. 358".