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Holotype, male (Fig. 62a). Length 2.75 mm. Color black; legs deep ferruginous, antenna light ferruginous. Body in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum in basal half with 3 ridges posteriorly continued to forehead; furrows each with 1 row of mesad directed setae; epistome weakly swollen, with transverse ridge. Pronotum deeply sculptured; with marked subapical constriction, apical collar with coarse punctures; disk with glabrous median ridge, on each side with additional three highly elevated coarsely punctate ridges; sides with oblique wrinkles and deep punctures. Elytra with striae deeply incised, towards sides with interspersed punctures; intervals costate, subglabrous, with sparse small punctures and wrinkles; apex extended ventrad, slightly beak-shaped. Femora edentate. Metafemur with denticulate dorsoposterior edge, subapically without stridulatory patch. Aedeagus (Fig. 62b) apically with submedian tooth shifted to the left; body at middle with broad depression visible in lateral aspect; transfer apparatus flagelliform, shorter than body, pointing basad; ductus ejaculatorius with bulbus. Intraspecific variation. Length 2.10–2.75 mm. Female rostrum in apical half dorsally flattened, subglabrous, with sparse punctures and lateral furrows; epistome simple.
Holotype (MZB): ARC0543 (EMBL # FN429249), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani, S02°31.683', E140°30.281', 960 m, 21-XI-2007, sifted. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani: 6 exx, same data as holotype; 2 exx, ARC0539 (EMBL # FN429245), ARC0540 (EMBL # FN429246), S02°31.594', E140°30.407', 1065 m, 21-XI-2007, sifted; 1 ex, 700 m, 22-XII-2004; 3 exx, 1000 m, 23-XII-2004, sifted; 1 ex, 1320 m, 23-XII-2004, sifted; 4 exx, 1100 m, 23-XII-2004, sifted.
Jayapura Reg. (Cyclops Mts). Elevation: 960–1320 m.
Sifted from leaf litter in primary forest.
This epithet is based on a combination of the Latin nouns plica (fold) and collum (neck, pronotum) and refers to the surface of the pronotum.
Trigonopterus plicicollis Riedel, sp. n. was coded as “Trigonopterus sp. 32” by Riedel et al. (2010) and Tänzler et al. (2012), respectively “Trigonopterus spaf” in the EMBL/GenBank/DDBJ databases.
- Riedel, A; Sagata, K; Surbakti, S; Rene Tänzler, ; Michael Balke, ; 2013: One hundred and one new species of Trigonopterus weevils from New Guinea ZooKeys, 280: 1-150. doi
- Riedel A, Daawia D, Balke M (2010) Deep cox1 divergence and hyperdiversity of Trigonopterus weevils in a New Guinea mountain range (Coleoptera, Curculionidae). Zoologica Scripta, 39 (1): 63-74. doi: 10.1111/j.1463-6409.2009.00404.x
- Tänzler R, Sagata K, Surbakti S, Balke M, Riedel A (2012) DNA barcoding for community ecology - how to tackle a hyperdiverse, mostly undescribed Melanesian fauna. PLoS ONE 7 (1): e28832. doi: 10.1371/journal.pone.0028832