Trigonopterus sordidus 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 : 71-72

80. Trigonopterus sordidus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 80a). Length 1.98 mm. Color black; antenna and tarsi light ferruginous; tibiae, femora, and head deep ferruginous. Body subovate; in dorsal aspect with distinct constriction between pronotum and elytron; in profile evenly convex. Rostrum rugose-punctate; epistome weakly, transversely swollen. Pronotum deeply rugose-punctate, each puncture containing one scale; majority of scales narrow, ochre; few scales almond-shaped, white. Elytra with striae deeply impressed; strial punctures with same set of scales as pronotum; intervals costate, largely subglabrous, but with scattered scales. Femora dentate. Metafemur with simple dorsoposterior edge, subapically with stridulatory patch. Aedeagus (Fig. 80b) complex, laterally incised, with dorsolateral well-sclerotized flanges; apex subtruncate, sparsely setose. Endophallus with various sclerites. transfer apparatus drop-shaped, apically pointed; ductus ejaculatorius with weak bulbus. Intraspecific variation. Length 1.86-2.28 mm. Color ferruginous in some possibly teneral specimens. Scattered scales on elytra more or less numerous.

Material examined.

Holotype (MZB): ARC0736 (EMBL # HE615419), WEST NEW GUINEA, Jayawijaya Reg., Jiwika, Kurulu, S03°57.161', E138°57.357', 1875 m, 24-XI-2007, sifted. Paratypes (ARC, SMNK, ZSM): WEST NEW GUINEA, Jayawijaya Reg., Jiwika, Kurulu: 1 ex, ARC1715 (EMBL # HE615995), S03°57.161', E138°57.357', 1875 m, 12-VII-2010, sifted; 2 exx (1 marked ARC0080), ca. 1700-2300 m, 02-IX-1991, sifted; 9 exx, 1900-2000 m, 23-IX-1992, sifted; 2 exx, 1900-2050 m, 24-X.1993.

Distribution.

Jayawijaya Reg. (Jiwika). Elevation: 1875-1900 m.

Biology.

Sifted from leaf litter in montane forest.

Etymology.

This epithet is based on the Latin adjective sordidus (dirty) and refers both to the occurrence of incrustations and the species´ general appearance making it hard to distinguish from a grain of dirt.

Notes.

Trigonopterus sordidus Riedel, sp. n. was coded as " Trigonopterus sp. 176" by Tänzler et al. (2012).