One hundred and one new species of Trigonopterus weevils from New Guinea Author Riedel, Alexander Author Sagata, Katayo Author Surbakti, Suriani Author Rene Taenzler, Author Michael Balke, text ZooKeys 2013 280 1 150 http://dx.doi.org/10.3897/zookeys.280.3906 journal article http://dx.doi.org/10.3897/zookeys.280.3906 1313-2970-280-1 18. Trigonopterus costicollis Riedel sp. n. Diagnostic description. Holotype, male (Fig. 18a). Length 2.80 mm. Color black; tarsi and antenna ferruginous. Body elongate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum with median costa and pair of submedian costae, furrows between with sparse rows of suberect scales; epistome flat. Pronotum with marked subapical constriction, anteriorly densely punctate; disk sparsely punctate, deeply sculptured, with median ridge and pair of broad submedian ridges; behind constriction anteriorly with pair of lateral angular protrusions. Elytra subglabrous except basally striae 1-3 with each one fovea; remaining striae indistinct, marked by minute punctures; apex rounded. Femora edentate. Metafemur subapically with stridulatory patch. Tarsomere 3 small, hardly larger than preceding, onychium ca. 2.1 x longer than tarsomere 3. Aedeagus (Fig. 18b) apically angulate, sparsely setose; transfer-apparatus flagelliform; ductus ejaculatorius with indistinct bulbus. Material examined. Holotype (SMNK): ARC1094 (EMBL # HE615723), PAPUA NEW GUINEA, Simbu Prov., Karimui Dist., Haia, S06°43.948' , E144°59.856' , 915 m, 26-IX-2009, sifted. Distribution. Simbu Prov. (Haia). Elevation: 915 m. Biology. Sifted from leaf litter in primary forest. Etymology. This epithet is a combination of the Latin nouns costa (rib, ridge) and collum (neck; pronotum) refers to the sculpture of its pronotum. Notes. Trigonopterus costicollis Riedel, sp. n. was coded as " Trigonopterus sp. 166" by Taenzler et al. (2012) .