Trigonopterus basalis 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 : 15-16

14. Trigonopterus basalis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 14a). Length 2.42 mm. Color black; base of elytra and legs ferruginous; antenna light ferruginous. Body subovate; in dorsal aspect with marked constriction between pronotum and elytron; in profile almost evenly convex. Rostrum dorsally scabrous, basally with indistinct median ridge; epistome forming angulate ridge. Pronotum moderately densely punctate. Elytra with striae marked by small punctures; interval 4 basally with cluster of few subovate, cream-colored, recumbent scales; interval 7 subapically forming indistinct ridge. Meso- and metafemur with anteroventral ridge weakly dentate. Meso- and metatibia in basal half widened, subapically narrowed; dorsal edge basally granulate; uncus large, peg-shaped. Metafemur with denticulate dorsoposterior edge, subapically without stridulatory patch. Aedeagus (Fig. 14b) with sides of body in apical third converging, apex rounded; orifice retracted; endophallus denticulate; transfer apparatus symmetrical; ductus ejaculatorius without bulbus. Intraspecific variation. Length 1.98-2.48 mm. Female rostrum dorsally subglabrous in apical half, with small punctures, epistome simple.

Material examined.

Holotype (MZB): ARC0523 (EMBL # FN429229), WEST NEW GUINEA, Jayapura Reg., Cyclops Mts, Sentani, S02°31.912', E140°30.416', 785 m, 02-XII-2007, sifted. Paratypes (SMNK, ZSM): WEST NEW GUINEA, Jayapura Reg., Cyclops Mts: 4 exx, ARC0524 (EMBL # FN429230), same data as holotype; 16 exx, ARC0532 (EMBL # FN429238), Doyo, S02°32.478', E140°28.835', 365 m, 27-XI-2007, sifted; 2 exx, Sentani, S02°32.031', E140°30.412', 710 m, 02-XII-2007, sifted; 5 exx (1 marked “ARC0105”), Sentani, 600 m, 22-XII-2004, sifted; 1 ex, Sentani, 700 m, 22-XII-2004, sifted; 17 exx, Sentani, S02°32.221', E140°30.526', 575 m, 19-XI-2007, sifted; 1 ex, Sentani, S02°32.166' E140°30.512', 620 m, 19-XI-2007, sifted; 3 exx, Sentani, S02°32.291', E140°30.505', 515 m, 19-XI-2007, sifted.

Distribution.

Jayapura Reg. (Cyclops Mts). Elevation: 365-785 m.

Biology.

Sifted from leaf litter in primary forest.

Etymology.

This epithet is based on the Latin adjective basalis (characterized by the base) and refers to the elytral base differing in color and vestiture from the remainder.

Notes.

Trigonopterus basalis Riedel, sp. n. was coded as " Trigonopterus sp. 42" by Riedel et al. (2010) and Tänzler et al. (2012), respectively " Trigonopterus spap" in the EMBL/GenBank/DDBJ databases.