Trigonopterus durus 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 : 24-25

25. Trigonopterus durus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 25a). Length 3.69 mm. Color black; base of antennal scape ferruginous. Body subovate; with weak constriction between pronotum and elytron; in profile evenly convex. Rostrum punctate-rugose, with pair of sublateral furrows. Eyes dorsally bordered by furrow. Pronotum subglabrous, densely punctate with minute punctures; disk subquadrate, rounded towards sides. Elytra tapering apicad; striae indistinct, marked by rows of small punctures; intervals flat, with confused minute punctures; elytral base with row of foveae continued laterally behind humeri bordering ridge. Femora subglabrous, edentate. Metafemur dorsally partly covered with silvery scales; with weakly denticulate dorsoposterior edge; subapically with stridulatory patch. Mesotibia and metatibia with inconspicuous straight premucro below tarsal insertion. Aedeagus (Fig. 25b) with sides of body basally converging, in apical 1/3 with weak constriction; apex with median, broad angular extension, sparsely setose; transfer apparatus spiniform; ductus ejaculatorius without bulbus. Intraspecific variation. Length 3.38-4.64 mm. Female rostrum slender, dorsally subglabrous, sparsely punctate with small punctures. Pronotum of males anteriorly subangulate, in females sides curving more evenly towards apex. Elytra of females shorter and dorsally rather convex; elytra of males apically slightly extended and dorsally slightly flattened.

Material examined.

Holotype (MZB): ARC1790 (EMBL # HE616067), WEST NEW GUINEA, Jayawijaya Reg., Bokondini, S03°41.787', E138°40.229' to S 03°41.778', E138°40.129', 1705-1710 m, 17-VII-2010. Paratypes (ARC, SMNK, ZSM): 91 exx, ARC1791 (EMBL # HE616068), ARC1792 (EMBL # HE616069), same data as holotype; 6 exx, ARC1793 (EMBL # HE616070), Bokondini, S03°40.345', E138°42.386' to S03°40.255', E138°42.189', 1655-1700 m, 18-VII-2010; 85 exx, Angguruk, 1600-1700 m, 21-IX-1991; 1 ex, Angguruk, 1200-1500 m, 23-IX-1992; 2 exx, Angguruk - Tanggeam, 1500-1800 m, 28-29-IX-1991.

Distribution.

Jayawijaya Reg. (Bokondini, Angguruk). Elevation: 1700-1710 m.

Biology.

Beaten from foliage of montane forests.

Etymology.

This epithet is based on the Latin adjective durus (hard, tough) and refers to the physical properties of the species. The name would be equally fitting many other species of this genus and should not be seen as diagnostic.

Notes.

Trigonopterus durus Riedel, sp. n. was coded as " Trigonopterus sp. 102" by Tänzler et al. (2012).