Trigonopterus gonatoceros 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 : 30-31

33. Trigonopterus gonatoceros Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 33a). Length 2.90 mm. Color black. Body subovate; almost without constriction between pronotum and elytron; in profile evenly convex. Rostrum dorsally relatively flat, with two indistinct submedian rows of punctures, dorsolaterally with pair of furrows continuing along eye; surface weakly microreticulate. Pronotum sparsely punctate with double-punctures each consisting of two minute approximate punctures. Elytra with striae distinct, dorsally punctures small, laterally large; intervals flat, with row of minute punctures, subglabrous. Femora edentate. Metafemur with simple dorsoposterior edge; subapically with stridulatory patch. Tibial base dentiform, when leg extended tibial tooth overlapping femoral apex dorsally. Thoracic and abdominal venter with dense erect setae. Aedeagus (Fig. 33b) apically subangulate, subglabrous; transfer apparatus flagelliform, 1.5 X longer than body; endophallus with two pairs of sclerites; ductus ejaculatorius without bulbus. Intraspecific variation. Length 2.75-2.88 mm. Female venter subglabrous.

Material examined.

Holotype (MZB): ARC1776 (EMBL # HE616053), WEST NEW GUINEA, Jayawijaya Reg., Bokondini, S03°40.345', E138°42.386' to S03°40.255', E138°42.189', 1655-1700 m, 18-VII-2010. Paratypes (SMNK, ZSM): 81 exx, ARC1777 (EMBL # HE616054), ARC1778 (EMBL # HE616055), same data as holotype.

Distribution.

Jayawijaya Reg. (Bokondini). Elevation: ca. 1655-1700 m.

Biology.

Beaten from foliage of montane forests.

Etymology.

This epithet is based on a combination of the Greek nouns gonatos (knee) and ceros (horn) in apposition and refers to the peculiar extensions of the tibial base.

Notes.

Trigonopterus gonatoceros Riedel, sp. n. was coded as " Trigonopterus sp. 121" by Tänzler et al. (2012).