Trigonopterus tibialis 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 : 81

91. Trigonopterus tibialis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 91a). Length 2.25 mm. Color black; legs deep ferruginous; antenna and tarsi light ferruginous. Body subovate; with weak constriction between pronotum and elytron; in profile evenly convex. Rostrum dorsally rugose-punctate, at middle with low median ridge and pair of submedian ridges. Eyes large. Pronotum punctate; interstices usually larger than diameter of punctures. Elytra punctate with small punctures; striae weakly impressed; intervals with minute punctures; lateral stria behind humeri with dense row of deep punctures. Femora with small tooth at middle. Metafemur dorsoposteriorly punctate-denticulate; subapically with stridulatory patch. Tibiae dorsally carinate, with rows of dark scales partly projecting over dorsal edge. Abdominal ventrite 5 flat, densely punctate. Aedeagus (Fig. 91b) with sides converging in apical half; apex rounded, sparsely setose; transfer-apparatus asymmetrical, spiniform, curved somewhat S-shaped, subequal to body of aedeagus; ductus ejaculatorius without bulbus. Intraspecific variation. Length 1.86-2.58 mm. Female rostrum dorsally without distinct ridges, with rows of punctures.

Material examined.

Holotype (MZB): ARC0428 (EMBL # FN429139), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani, S02°31.2', E140°30.5', 1420-1520 m, 30-XI-2007, beaten. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani: 15 exx, ARC0429 (EMBL # FN429140), ARC0430 (EMBL # FN429141), same data as holotype; 16 exx, S02°31.3', E140°30.5', 1200-1420 m, 30-XI-2007; 2 exx, S02°31.281', E140°30.535', 1420 m, 30-XI-2007; 1 ex, 1100-1600 m, 05-X-1991; 2 exx, 950-1450 m, 03-X-1992; 2 exx, 300-1400 m, 10-VIII-1991; 5 exx (1 marked as “ARC00410”) 1100-1600 m, 05-X-1991; 1 ex, 1200-1400 m, 09-VIII-1992.

Distribution.

Jayapura Reg. (Cyclops Mts). Elevation: 1400-1420 m.

Biology.

Collected by beating foliage in montane forests.

Etymology.

This epithet is based on the Latin noun tibia (shinbone) and refers to the species´ diagnostic tibial morphology.

Notes.

Trigonopterus tibialis Riedel, sp. n. was coded as " Trigonopterus sp. 16" by Riedel et al. (2010) and Tänzler et al. (2012), respectively " Trigonopterus spp" in the EMBL/GenBank/DDBJ databases.