Trigonopterus montivagus 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 : 47-48

52. Trigonopterus montivagus Riedel sp. n.

Diagnostic description.

Holotype, male (Fig. 52a). Length 2.94 mm. Color black; antennae light ferruginous, legs deep ferruginous. Body subovate; with weak constriction between pronotum and elytron; in profile evenly convex. Rostrum in basal half with distinct median ridge and pair of submedian ridges, furrows with sparse rows of yellowish scales; apically weakly punctate, sparsely setose. Pronotum coarsely punctate-reticulate. Elytra with dense, somewhat confused punctation; striae distinct, impressed as very fine lines, strial punctures small; intervals with slightly smaller punctures; laterally behind humeri simple. Femora edentate. Metafemur with denticulate dorsoposterior edge, with sparse row of suberect silvery scales; subapically with stridulatory patch. Metatibia apically with uncus and minute premucro. Abdominal ventrite 5 with shallow impression, densely punctate, with dense suberect scales. Aedeagus (Fig. 52b) with sides in apical 1/3 converging, weakly rounded, sparsely setose; transfer-apparatus spiniform; ductus ejaculatorius with bulbus. Intraspecific variation. Length 2.53-3.20 mm. Female rostrum dorsally subglabrous, sparsely punctate, in basal ¼ with longitudinal ridges and furrows. Elytral sculpture differing markedly among populations: striae weakly or hardly impressed in specimens from Eastern Highlands; distinctly impressed in specimens from Pindiu; deeply incised forming well-defined furrows in specimens from Mindik.

Material examined.

Holotype (SMNK): ARC1873 (EMBL # HE616150), PAPUA NEW GUINEA, Eastern Highlands Prov., Aiyura, S06°21.033', E145°54.597', 2169 m, 06-II-2010. Paratypes (NAIC, SMNK, ZSM): PAPUA NEW GUINEA: 2 exx, ARC1874 (EMBL # HE616151), ARC1875 (EMBL # HE616152), same data as holotype; 4 exx, Okapa, Afiyaleto village, S06°25.593', E145°34.862' to S06°25.212', E145°35.498', 1911 m, 18-III-2010, beaten; 1 ex, Okapa, Isimomo, S06°25.003', E145°34.527', 2131 m, 22-XII-2010; 2 exx, Okapa, Konafi to Isimomo, S06°25.593', E145°34.862', S06°25.003', E145°34.527', 1911-2131 m, 18-III-2010, 3 exx, Okapa, Kimiagomo village, Hamegoya, S06°25.727', E145°35.455', S06°25.117', E145°35.225', 1891-2131 m, 18-III-2010; 3 exx, ARC1054 (EMBL # HE615685), ARC1055 (EMBL # HE615686), ARC1056 (EMBL # HE615687), Eastern Highlands Prov., Goroka, Mt. Gahavisuka, S06°00.864', E145°24.779', 2150-2250 m, 24-X-2009; 6 exx, ARC1191 (EMBL # HE615819), ARC1192 (EMBL # HE615820), ARC1193 (EMBL # HE615821), Morobe Prov., Huon peninsula, Mindik, S06°27.380', E147°25.099' to S06°27.267', E147°25.049', 1500-1650 m, 09-X-2009; 2 exx, Mindik, 1200-1500 m, 26-IV-1994; 11 exx, Mindik, 1670-1710 m, S06°27.221', E147°24.185' to S06°27.196', E147°24.276', 10-X-2009, beaten; 22 exx, ARC1243 (EMBL # HE615871), ARC1244 (EMBL # HE615872), ARC1245 (EMBL # HE615873), Morobe Prov., Huon peninsula, mountain SW Pindiu, S06°27.437', E147°30.512' to S06°27.435', E147°30.310', 1170-1225 m, 14-X-2009; 1 ex, mountain SW Pindiu, 1225-1340 m, S06°27.435', E147°30.310' to S06°27.307', E147°30.168', 14-X-2009, beaten; 8 exx, Boana, Saruwaged-Mts, 1000-1500 m, 21-22-X-1992; 4 exx, E Pindiu, Kobau, 1250-1400 m, 24-IV-1998; 1 ex, W Pindiu, 1000-1400 m, 1200-1500 m, 26-IV-1998.

Distribution.

Eastern Highlands Prov. (Aiyura, Goroka, Okapa); Morobe Prov. (Mindik, Pindiu). Elevation: 1340-2169 m.

Biology.

Beaten from foliage of montane forests.

Etymology.

This epithet is based on a combination of the Latin noun mons (mountain) and the participle vagus (wandering) and refers to the relatively wide distribution in the highlands of Papua New Guinea.

Notes.

Trigonopterus montivagus Riedel, sp. n. was coded as " Trigonopterus sp. 205" by Tänzler et al. (2012).