Trigonopterus rhinoceros 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 : 62

69. Trigonopterus rhinoceros Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 69a). Length 2.14 mm. Color black; tarsi ferruginous; antenna light ferruginous. Body subglobose; with weak constriction between pronotum and elytron; in profile evenly convex. Rostrum in basal half with median ridge and pair of submedian ridges, at middle with tubercle; apical half laterally bordered by ridges; epistome at middle with dorsoposteriad directed horn. Pronotum basally angulate; apex, base, and sides densely punctate, disk medially and sublaterally subglabrous. Elytra with suture and striae 1-3 incised; all striae marked by small punctures; intervals subglabrous, with row of minute punctures; base with yellowish, posteriad directed scales; interval 7 subapically swollen. Meso- and metafemur with anteroventral ridge weakly dentate. Metatibia ventrally in apical half with row of long setae. Metafemur with stridulatory patch. Aedeagus (Fig. 69b) with apex rounded; endophallus distally with brace-shaped sclerite; ductus ejaculatorius, without bulbus. Intraspecific variation. Length 1.76-2.26 mm. Female rostrum dorsally flattened, medially subglabrous, with rows of punctures and lateral furrows; epistome simple. Female metatibia subapically simple, without long setae.

Material examined.

Holotype (MZB): ARC0554 (EMBL # FN429260), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani, S02°31.182', E140°30.542', 1510 m, 30-XI-2007, sifted. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Senani: 7 exx, ARC0555 (EMBL # FN429261), ARC0562 (EMBL # FN429268), same data as holotype; 1 ex, S02°31.383', E140°30.490', 1275 m, 30-XI-2007, sifted; 1 ex, S02°31.281', E140°30.535', 1420 m, 30-XI-2007, sifted; 4 exx (1 marked ARC0095), 1320 m, 23-XII-2004, sifted; 2 exx, 300-1400 m, 10-VIII-1991; 1 ex, 1200-1400 m, 09-VIII-1992, sifted.

Distribution.

Jayapura Reg. (Cyclops Mts). Elevation: 1275-1510 m.

Biology.

Sifted from leaf litter in montane crippled forest.

Etymology.

This epithet is a noun in apposition and refers to the horn on the rostral apex, resembling the one of a mammal rhinoceros.

Notes.

Trigonopterus rhinoceros Riedel, sp. n. was coded as " Trigonopterus sp. 44" by Riedel et al. (2010) and Tänzler et al. (2012), respectively " Trigonopterus spar" in the EMBL/GenBank/DDBJ databases.