Trigonopterus insularis 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 : 35-36

39. Trigonopterus insularis Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 39a). Length 3.41 mm. Color black; antenna and tarsi ferruginous. Body subovate; without constriction between pronotum and elytron; in profile evenly convex. Rostrum in basal half with distinct median carina and pair of indistinct sublateral ridges; with sparse rows of white scales; subapical third subglabrous, weakly punctate; in front of antennal insertion with weak constriction. Eyes large, medially approximate. Pronotum densely punctate with small punctures; sides separated by indistinct edge bearing dense row of punctures; laterally above coxa sparsely squamose with white scales. Elytral striae distinct with small punctures; intervals flat, subglabrous, sparsely punctate with minute punctures; basal margin straight, simple. Femora with anteroventral ridge distinct, at base abruptly ending and forming markedly projecting blunt angle; edentate. Mesofemur and metafemur dorsally densely squamose with white scales but partly abraded. Metafemur with smooth dorsoposterior edge; subapically without stridulatory patch. Aedeagus (Fig. 39b) with apodemes ca. 3 × as long as body; sides of body in basal half subparallel, markedly sclerotized, mid-portion of body weakly sclerotized; apex subangulate; transfer apparatus flagelliform, longer than body; ductus ejaculatorius subapically with bulbus. Intraspecific variation. Length 3.38-3.41 mm. No female specimen available.

Material examined.

Holotype (MZB): ARC1694 (EMBL # HE615981), WEST NEW GUINEA, Biak Reg., Supiori Isl., Korido, S00°49.715', E135°35.055', 50-100 m, 09-VII-2010. Paratype (SMNK): 1 ex, ARC1695 (EMBL # HE615982), same data as holotype.

Distribution.

Biak Reg. (Supiori Isl.). Elevation: ca. 50-100 m.

Biology.

Beaten from foliage of lowland forest.

Etymology.

This epithet is based on the Latin adjective insularis (of an island) and refers to the type locality, Supiori Island.

Notes.

Trigonopterus insularis Riedel, sp. n. was coded as " Trigonopterus sp. 57" by Tänzler et al. (2012).