Trigonopterus maculatus 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 : 44-45

49. Trigonopterus maculatus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 49a). Length 3.92 mm. Color black; basal half of elytra with large orange spot. Body elongate-subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum slender; dorsally punctate-rugose, with indistinct median ridge and pair of submedian ridges; apical 1/3 sparsely punctate; at base with erect white elongate scales, apically replaced by bristles. Eyes large, medially approximate. Pronotum densely punctate-reticulate; disk basally at middle with punctures containing each one long erect seta; basal contours of disk subparallel, slightly converging in straight line; laterally in front of procoxa with acute process, squamose with white scales. Elytra subglabrous; striae distinct, marked by small to minute punctures; intervals with row of minute punctures; basal margin with ridge extending behind humeri, medially somewhat swollen, bordered by indistinct row of small punctures. Femora with acute tooth at middle. Mesofemur and metafemur dorsally sparsely squamose with narrow silvery scales. Metafemur with smooth dorsoposterior edge; subapically without stridulatory patch. Thoracic and abdominal venter concave, medially densely setose. Abdominal ventrite 5 sublaterally with pair of knobs, medially densely punctate and setose. Aedeagus (Fig. 49b) with apex subangulate; ventral surface of body subapically with pair of denticles; transfer apparatus dentiform, basally supported by Y-shaped sclerite; ductus ejaculatorius subapically without bulbus. Intraspecific variation. Length 3.74-3.92 mm. Female rostrum dorsally subglabrous, sparsely punctate, at base with erect white scales. Female venter subglabrous, abdominal ventrites 1-2 weakly convex.

Material examined.

Holotype (SMNK): ARC1840 (EMBL # HE616117), PAPUA NEW GUINEA, Eastern Highlands Prov., Aiyura, S06°21.033', E145°54.597', 2169 m, 06-II-2010. Paratypes (NAIC, SMNK, ZSM): PAPUA NEW GUINEA, Eastern Highlands Prov.: 3 exx, ARC1841 (EMBL # HE616118), same data as holotype; 2 exx, ARC1842 (EMBL # HE616119), Okapa, Kimiagomo village, Hamegoya, S06°25.727', E145°35.455', S06°25.117', E145°35.225', 1891-2131 m, 18-III-2010.

Distribution.

Eastern Highlands Prov. (Aiyura, Okapa). Elevation: 2131-2169 m.

Biology.

Beaten from foliage of montane forests.

Etymology.

This epithet is based on a combination of the Latin noun macula (mark, spot) and refers to the conspicuous orange spot on the elytra.

Notes.

Trigonopterus maculatus Riedel, sp. n. was coded as " Trigonopterus sp. 132" by Tänzler et al. (2012).