Trigonopterus angulatus 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 : 9-10

7. Trigonopterus angulatus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 7a). Length 2.63 mm. Color black; antenna light ferruginous; tarsi and tibiae deep ferruginous. Body subovate-hexa-goniform; in dorsal aspect with shallow constriction between pronotum and elytron; in profile evenly convex. Rostrum in basal half with median and pair of submedian carinae; laterally somewhat flattened; with sparse suberect scales; epistome with transverse, angulate ridge. Pronotum with anterior margin curved dorsad, forming lateral angles; disk subglabrous, anteriorly densely coarsely punctate, towards sides forming edges; laterally in front and behind procoxa with cavity. Elytra subglabrous; intervals flat, with minute punctures; striae weakly incised on disk, towards glabrous sides forming edges; interval 7 subapically forming edge, apex angulate. Femora edentate. Metafemur dorsally squamose with indistinct suberect scales; in apical third without transverse row of setae, subapically with stridulatory patch. Aedeagus (Fig. 7b) apically subangulate, median tip truncate; with complex, symmetrical transfer apparatus; ductus ejaculatorius with indistinct bulbus. Intraspecific variation. Length 2.60-2.63 mm. No female specimen available.

Material examined.

Holotype (SMNK): ARC1088 (EMBL # HE615718), PAPUA NEW GUINEA, Simbu Prov., Karimui Dist., Haia, S06°41.216', E145°00.945', 965 m, 27-IX-2009, sifted. Paratype (NAIC): 1 ex, ARC1098 (EMBL # HE615727): PAPUA NEW GUINEA, Simbu Prov., Karimui Dist., Haia, S06°40.976', E145°00.979', 1135 m, 27-IX-2009, sifted.

Distribution.

Simbu Prov. (Haia). Elevation: 965-1135 m.

Biology

. Sifted from leaf litter in primary forest.

Etymology.

This epithet is based on the Latin adjective angulatus (with angles) and refers to the outline of its body in dorsal aspect.

Notes.

Trigonopterus angulatus Riedel, sp. n. was coded as " Trigonopterus sp. 194" by Tänzler et al. (2012).