Trigonopterus verrucosus 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 : 85-86

96. Trigonopterus verrucosus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 96a). Length 2.56 mm. Color black, antenna and tarsi ferruginous. Body subovate, extremely uneven, in dorsal aspect with distinct constriction between pronotum and elytron; in profile without such constriction. Rostrum in basal half medially carinate, coarsely punctate, sparsely setose; epistome with transverse, angulate ridge. Pronotum with marked subapical constriction; laterally projecting with marked angular protrusions; disk longitudinally costate-tuberculate, in basal half medially with prominent ridge. Elytra with striae deeply incised; intervals undulating-costate, some areas markedly elevated, constricted along 2 transverse lines, subglabrous, with sparse minute punctures and setae; apex extended ventrad, slightly beak-shaped, ventrally truncate. Metafemur with dorsoposterior edge simple, in apical third with transverse row of small suberect setae, subapically with stridulatory patch. Disk of abdominal ventrites 1-2 excavated; ventrite 2 projecting dentiform over elytral edge in profile. Aedeagus (Fig. 96b) with apex medially pointed; transfer apparatus complex, symmetrical; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.09-2.56 mm. Female rostrum dorsally with median costa in basal half; epistome simple.

Material examined.

Holotype (MZB): ARC0743 (EMBL # HE615426), WEST NEW GUINEA, Jayawijaya Reg., Jiwika, Kurulu, S03°57.161', E138°57.357', 1875 m, 24-XI-2007, sifted. Paratypes (ARC, SMNK): WEST NEW GUINEA, Jayawijaya Reg. Jiwika, Kurulu: 1 ex (marked as ARC0612), 1900-2000 m, 23-IX-1992, sifted; 1 ex, ca. 1700-2300 m, 02-IX-1991, sifted.

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 verrucosus (full of warts) and refers to the species´ remarkable body-sculpture.

Notes.

Trigonopterus verrucosus Riedel, sp. n. was coded as " Trigonopterus sp. 196" by Tänzler et al. (2012).