Trigonopterus balimensis 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 : 14-15

13. Trigonopterus balimensis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 13a). Length 2.58 mm. Color orange-ferruginous; pronotum and parts of head black. Body fusiform, almost without constriction between pronotum and elytron; in profile dorsally flat, towards apex convex. Rostrum with median costa flat, pair of submedian furrows containing sparse rows of mesad-directed setae. Pronotum subglabrous, punctate with small to minute punctures. Elytra subglabrous, punctation confused with small to minute punctures. Femora with anteroventral ridge terminating with tooth in apical third. Anteroventral ridge of mesofemur high, at middle with subangulate incision. Metafemur with crenulate dorsoposterior edge; subapically with stridulatory patch; posteroventral ridge at middle with knob. Mesotibia with dorsal edge pushed forward, apex slightly curved ventrad. Abdominal ventrite 1 besides metacoxa with brush of erect scales. Aedeagus (Fig. 13b) with body subrectangular; apex with pair of long pointed brushes; transfer-apparatus complex, symmetrical; ductus ejaculatorius with bulbus. Intraspecific variation. Length 2.11-2.96 mm. Female mesofemur with evenly denticulate anteroventral ridge, without incision at middle. Posteroventral ridge of female metafemur simple. Female mesotibia straight. Abdominal ventrite 1 besides metacoxa simple.

Material examined.

Holotype (MZB): ARC0752 (EMBL # HE615435), WEST NEW GUINEA, Jayawijaya Reg., Jiwika, Kurulu, S03°57.043', E138°57.410', 1920-1950 m, "Mim 3", 26-XI-2007. Paratypes (ARC, SMNK, NHMB, ZSM): WEST NEW GUINEA, Jayawijaya Reg.: 45 exx, ARC0753 (EMBL # HE615436), ARC0754 (EMBL # HE615437), same data as holotype; 34 exx, Jiwika, Kurulu, S03°56.146', E138°57.710', 2245-2290 m, "Mim 4", 26-XI-2007; 35 exx, Jiwika, Kurulu, S03°56.5', E138°57.1', 1900-2245 m, 26-XI-2007; 45 exx, Jiwika, Kurulu, S03°57.161', E138°57.357', 1875 m, 11-VII-2010, sifted; 135 exx, Jiwika, Kurulu, S03°57.161', E138°57.357' to S03°56.977', E138°57.441', 1875-1990 m, 12-VII-2010; 2 exx, ARC1711 (EMBL # HE615991), ARC1712 (EMBL # HE615992), Jiwika, Kurulu, S03°57.161', E138°57.357' to S03°56.977', E138°57.441', 1875-1990 m, 12-VII-2010; 73 exx (1 marked ARC0034), Jiwika, Kurulu, 1800-2300 m, 31-V-1998; 20 exx, Jiwika, Kurulu, 1700-2300 m, 02-IX-1991; 9 exx, Jiwika, Kurulu, 1700-2300 m, 06-IX-1991; 15 exx, Jiwika, 1750-2100 m, 05-VII-1994; 18 exx, Jiwika, Kurulu, trail to Wandanku, 2240-2420 m, 28-IX-1996; 17 exx, Jiwika, Kurulu, trail to Wandanku, 1900-2150 m, 28-29-IX-1996; 19 exx, Jiwika, Kurulu, 1900-2300 m, 29-IX-1992; 6 exx, Jiwika, 1700-2100 m, 05-XII-1995; 14 exx, Jiwika, 1700-2000 m, 11-IX-1991; 4 exx, Jiwika, trail to Wandanku, 2240-2420 m, 28-IX-1996; 1 ex, Jiwika, 2300 m, 1992; 69 exx, Baliem-vall., ca. 1700 m, III-1992.

Distribution.

Jayawijaya Reg. (Jiwika). Elevation: 1875-2240 m.

Biology.

Beaten from foliage of montane forests.

Etymology.

This epithet is based on the name of the Balim-river area which is close to the type locality.

Notes.

Trigonopterus balimensis Riedel, sp. n. was coded as " Trigonopterus sp. 172" by Tänzler et al. (2012). At the time, it was lumped with a closely related but distinct species from Poga and Lake Habbema.