Trigonopterus striatus 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 : 73

82. Trigonopterus striatus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 82a). Length 1.92 mm. Color of antenna and tarsi light ferruginous; tibiae, head, and anterior part of pronotum deep ferruginous; remainder black. Body subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum rugose-punctate, sparsely setose with recumbent mesad directed setae. Pronotum with distinct subapical constriction; disk longitudinally rugose-punctate; sparsely setose. Elytra with striae deeply impressed; each puncture with inconspicuous seta; intervals weakly costate, subglabrous; sutural interval more distinctly raised; apex extended ventrad, slightly beak-shaped. Meso- and metafemur ventrally weakly dentate. Metafemur with denticulate dorsoposterior edge, subapically without stridulatory patch. Abdominal venter excavated. Abdominal ventrites 4 simple; ventrite 5 flat, ferruginous. Aedeagus (Fig. 82b) with apex extended, bent to the left; transfer apparatus short, spiniform; basal orifice ventrally with rim; apodemes short; ductus ejaculatorius without bulbus. Intraspecific variation. Length 1.43-1.96 mm. Female rostrum dorsally subglabrous, sparsely punctate. Abdominal ventrite 3 of females with flattened process projecting over retracted, subglabrous ventrites 4-5; process of ventrite 3 shaped like a flattened thistle-leaf with one long median spine and two shorter spines on each side.

Material examined.

Holotype (MZB): ARC0603 (EMBL # HE615329), WEST NEW GUINEA, Manokwari, Mt. Meja, S00°51.497', E134°04.949', 220 m, 05-XII-2007, sifted. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Manokwari, Mt. Meja: 2 exx, ARC0604 (EMBL # HE615330), ARC0605 (EMBL # HE615331), same data as holotype; 6 exx, S00°51.400', E134°04.918', 225 m, 06-XII-2007, sifted; 13 exx (1 marked as “ARC00141”), 200 m, 30-XII-2004, sifted; 3 exx, 22-23-IX-1990, sifted; 5 exx, 200 m, 19-IV-1993, sifted; 19 exx, 200 m, 30-XII-2000, sifted.

Distribution.

Manokwari Reg. (Mt. Meja). Elevation: 200-225 m.

Biology.

Sifted from leaf litter in lowland forest.

Etymology.

This epithet is based on the Latin participle striatus (provided with furrows) and refers to the species´ body-sculpture.

Notes.

Trigonopterus striatus Riedel, sp. n. was coded as " Trigonopterus sp. 256" by Tänzler et al. (2012).