Trigonopterus angustus 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 : 10-11

8. Trigonopterus angustus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 8a). Length 2.83 mm. Color black; legs and antenna ferruginous. Body elongate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum basally with distinct median and pair of submedian carinae, in apical ¼ relatively smooth, basally sparsely squamose. Pronotum densely punctate with large punctures except small glabrous area at center; interspaces smaller than puncture´s diameter. Elytra dorsally punctate with deep punctures; near base and along suture more densely punctate, punctation confuse; basal margin near elytral suture somewhat swollen and glabrous; striae impressed as fine lines; laterally punctation relatively sparse, behind humerus with row of deep punctures. Femora edentate. Profemur in basal third posteriorly with callus. Metafemur subapically without stridulatory patch. Aedeagus (Fig. 8b) apically subangulate, medially truncate, with pair of stout setae; body flattened, sides subparallel; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.24-2.83 mm. Body of females more slender. Female rostrum dorsally subglabrous, punctate, basally sparsely squamose. Female abdominal ventrites 1-2 flat.

Material examined.

Holotype (MZB): ARC0626 (EMBL # FN429283), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani, S02°32.3', E140°30.4', 350-620 m, 19-XI-2007, beaten. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts: 4 exx, Sentani, ARC0455 (EMBL # FN429166), ARC0456 (EMBL # FN429167), ARC0479 (EMBL # FN429186), ARC0631 (EMBL # FN429286), S02°31.3', E140°30.5', 1200-1420 m, 30.XI.2007; 2 exx, ARC 0627 (EMBL # FN429284), ARC0630 (EMBL # FN429285), same data as holotype; 1 ex, Cyclops Mts, Angkasa indah ARC1693 (EMBL # HE615980), S02°30.355', E140°42.103' to S02°30.346', E140°42.087', 450-520 m, 28-VI-2010; 5 exx (1 marked as “ARC0046”), 950-1450 m, 03-X-1992; 3 exx, 400-800 m, 07-VIII-1992; 1 ex, 1100-1600 m, 05-X-1991; 2 exx, 300-1400 m, 10-VIII-1991; 6 exx, 1200-1400 m, 09-VIII-1992; 3 exx, Lereh, 500-1000 m, 26-I-1996.

Distribution.

Jayapura Reg. (Cyclops Mts; Lereh). Elevation: 520-1200 m.

Biology.

Collected by beating foliage in montane forests.

Etymology.

This epithet is based on the Latin adjective angustus (narrow) and refers to its habitus.

Notes.

Trigonopterus angustus Riedel, sp. n. was coded as " Trigonopterus sp. 12" by Riedel et al. (2010) and Tänzler et al. (2012), respectively " Trigonopterus spl" in the EMBL/GenBank/DDBJ databases.