Trigonopterus constrictus 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 : 17

16. Trigonopterus constrictus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 16a). Length 2.55 mm. Color dark brown; antenna, tarsi, and elytra ferruginous. Body dull, microreticulate; subovate; in dorsal aspect with marked constriction between pronotum and elytron; in profile with shallow constriction. Rostrum sparsely punctate, with sublateral pair of furrows; epistome simple. Eyes large, divided into dorsal and ventral portions by marked incision of posterior margin. Pronotum with distinct subapical constriction; densely punctate with deep punctures; each puncture with one elongate-ovate, ochre scale. Elytra with striae deeply incised; intervals costate, each with one row of narrow scales. Metafemur subapically without stridulatory patch. Tibial apex with stout uncus and minute premucro. Onychium ca. 2.3 × longer than tarsomere 3. Aedeagus (Fig. 16b) with sides of apical half converging to apex, in profile markedly curved; transfer apparatus tubuliform; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.55-2.63 mm. Color with ferruginous elytra or entirely brown.

Material examined.

Holotype (MZB): ARC1731 (EMBL # HE616008), WEST NEW GUINEA, Jayawijaya Reg., Poga, S03°47.406', E138°35.507', 2410 m, 14-VII-2010, sifted. Paratypes (SMNK): WEST NEW GUINEA, Jayawijaya Reg., Poga: 1 ex, ARC1724 (EMBL # HE616004), S03°48.382', E138°34.780'; 2330 m, 13-VII-2010, sifted.

Distribution.

Jayawijaya Reg. (Poga). Elevation: 2330-2410 m.

Biology.

Sifted from leaf litter in montane forest.

Etymology.

This epithet is based on the Latin participle constrictus (constricted) and refers both to the constriction of the eye and the body between pronotum and elytron.

Notes.

Trigonopterus constrictus Riedel, sp. n. was coded as " Trigonopterus sp. 54" by Tänzler et al. (2012).