Trigonopterus plicicollis 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 : 56

62. Trigonopterus plicicollis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 62a). Length 2.75 mm. Color black; legs deep ferruginous, antenna light ferruginous. Body in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum in basal half with 3 ridges posteriorly continued to forehead; furrows each with 1 row of mesad directed setae; epistome weakly swollen, with transverse ridge. Pronotum deeply sculptured; with marked subapical constriction, apical collar with coarse punctures; disk with glabrous median ridge, on each side with additional three highly elevated coarsely punctate ridges; sides with oblique wrinkles and deep punctures. Elytra with striae deeply incised, towards sides with interspersed punctures; intervals costate, subglabrous, with sparse small punctures and wrinkles; apex extended ventrad, slightly beak-shaped. Femora edentate. Metafemur with denticulate dorsoposterior edge, subapically without stridulatory patch. Aedeagus (Fig. 62b) apically with submedian tooth shifted to the left; body at middle with broad depression visible in lateral aspect; transfer apparatus flagelliform, shorter than body, pointing basad; ductus ejaculatorius with bulbus. Intraspecific variation. Length 2.10-2.75 mm. Female rostrum in apical half dorsally flattened, subglabrous, with sparse punctures and lateral furrows; epistome simple.

Material examined.

Holotype (MZB): ARC0543 (EMBL # FN429249), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani, S02°31.683', E140°30.281', 960 m, 21-XI-2007, sifted. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani: 6 exx, same data as holotype; 2 exx, ARC0539 (EMBL # FN429245), ARC0540 (EMBL # FN429246), S02°31.594', E140°30.407', 1065 m, 21-XI-2007, sifted; 1 ex, 700 m, 22-XII-2004; 3 exx, 1000 m, 23-XII-2004, sifted; 1 ex, 1320 m, 23-XII-2004, sifted; 4 exx, 1100 m, 23-XII-2004, sifted.

Distribution.

Jayapura Reg. (Cyclops Mts). Elevation: 960-1320 m.

Biology.

Sifted from leaf litter in primary forest.

Etymology.

This epithet is based on a combination of the Latin nouns plica (fold) and collum (neck, pronotum) and refers to the surface of the pronotum.

Notes.

Trigonopterus plicicollis Riedel, sp. n. was coded as " Trigonopterus sp. 32" by Riedel et al. (2010) and Tänzler et al. (2012), respectively " Trigonopterus spaf" in the EMBL/GenBank/DDBJ databases.