Trigonopterus irregularis Riedel

Riedel, Alexander, Sagata, Katayo, Surbakti, Suriani, Rene Taenzler, & Michael Balke,, 2013, One hundred and one new species of Trigonopterus weevils from New Guinea, ZooKeys 280, pp. 1-150 : 36-37

40. Trigonopterus irregularis Riedel sp. n.

Diagnostic description.

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.

Material examined.

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.

Distribution.

Manokwari Reg. (Arfak Mts). Elevation: 1385-1580 m.

Biology.

Collected by beating foliage in montane forests.

Etymology.

This epithet is based on the Latin adjective irregularis (irregular) and refers to the elytral punctation.

Notes.

Trigonopterus irregularis Riedel, sp. n. was coded as " Trigonopterus sp. 247" by Tänzler et al. (2012).