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Holotype, male (Fig. 40a). Length 2.36 mm. Legs ferruginous, antenna light ferruginous, remainder black except elytral apex deep ferruginous, especially along sides. Body elongate; with distinct constriction between pronotum and elytron; in profile dorsally flat. Rostrum with distinct median and pair of submedian carinae, in apical ¼ relatively smooth. Pronotum densely punctate-reticulate, interspaces smaller than puncture´s diameter. Elytra dorsally with dense punctation confused, partly reticulate; striae laterally impressed as fine lines; basal margin medially bordered by narrow glabrous band. Femora edentate. Profemur in basal third posteriorly with callus. Meso- and metafemur on dorsal edge densely squamose with cream-colored scales. Metafemur subapically with indistinct stridulatory patch. Aedeagus (Fig. 40b) with sides curved, apex rounded; body flattened, transfer apparatus spiniform; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.34–2.59 mm. Female rostrum dorsally subglabrous, with pair of submedian rows of large punctures.
Holotype (MZB): ARC0780 (EMBL # HE615463), WEST NEW GUINEA, Manokwari, Arfak Mts, S01°03.723', E133°54.145', 1385 m, 08-XII-2007. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Manokwari, Mokwam, Siyoubrig: 1 ex, ARC0804 (EMBL # HE615487), S01°06.107', E133°54.888', 1530 m, 10-XII-2007, beaten; 1 ex, ARC0851 (EMBL # HE615533), S01°06.7', E133°54.6', 1580–1750 m, 11-XII-2007; 1 ex, Minyambou – Mokwam, 1300–1900 m, 16-IV-1993; 2 exx, Mokwam, Kwau, 1300–1650 m, 17-IV-1993.
Manokwari Reg. (Arfak Mts). Elevation: 1385–1580 m.
Collected by beating foliage in montane forests.
This epithet is based on the Latin adjective irregularis (irregular) and refers to the elytral punctation.
- 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
- 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