Trigonopterus parvulus 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 : 54-55

60. Trigonopterus parvulus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 60a). Length 1.54 mm. Antenna, legs, and head ferruginous; pronotum, elytra, and tarsi black. Body subovate; in dorsal aspect and in profile with distinct constriction between pronotum and elytron. Rostrum punctate; epistome simple. Eyes small, anterior margin angularly projecting. Pronotum with weak subapical constriction; disk densely, coarsely punctate; each puncture with short, yellowish scale. Elytra with striae deeply impressed; each puncture with suberect, yellowish scale; intervals subglabrous, costate, partly transversely confluent. Meso- and metafemur ventrally dentate. Metafemur subapically without stridulatory patch. Onychium ca. 1.6 × longer than tarsomere 3. Aedeagus (Fig. 60b) with apex asymmetrical, right side forming long curved extension; basal orifice ventrally with rim; transfer apparatus dentiform; ductus ejaculatorius without bulbus. Intraspecific variation. Length 1.46-1.54 mm. Female rostrum slightly longer, dorsally subglabrous, sparsely punctate, in basal third coarsely punctate. Female elytral apex markedly extended ven trad, beak-shaped. Abdominal ventrite 3 of females with flattened process projecting over ventrite 4, medially with bifid extension reaching base of ventrite 5, sublaterally with pair of shorter spines. Female abdominal ventrites 4-5 weakly sclerotized.

Material examined.

Holotype (MZB): ARC0832 (EMBL # HE983631), WEST NEW GUINEA, Manokwari, Arfak Mts, Mokwam, Siyoubrig, S01°07.066', E133°54.710', 1870 m, 11-XII-2007, sifted. Paratypes (SMNK, ZSM): 23 exx, ARC0833 (EMBL # HE615515), ARC0834 (EMBL # HE615516), same data as holotype.

Distribution.

Manokwari Reg. (Arfak Mts). Elevation: 1870 m.

Biology.

Sifted from leaf litter in montane forest.

Etymology.

This epithet is based on the Latin adjective parvulus (little) and refers to the species´ small body size.

Notes.

Trigonopterus parvulus Riedel, sp. n. was coded as " Trigonopterus sp. 233" by Tänzler et al. (2012).