Arsipoda montana sp. nov. urn:lsid:zoobank.org:act: D410BA08-D43B-438A-A48F-800B1F4CDCB8 Figs 2B, 4E, 9C, 14B Diagnosis Arsipoda montana sp. nov. is a bronze, strongly metallic species, quite similar to A. communis sp. nov. in sculpture and color. They can be distinguished by the more transverse pronotum and the more deeply impressed pronotal transverse sulcus in A. montana sp. nov. (Fig. 4B, E). Median lobe of aedeagus is also useful to discriminate between the two species (Figs 8D, 9C). Etymology The specific epithet is a Latinized adjective referring to the high altitude where the species was collected. Type material Holotype NEW CALEDONIA (S): ♂, Mt Humboldt, -21.8793 166.4232, ca 1400 m, montane maquis, 13 Nov. 2010, R. Ruta and M. Wanat leg. (MNHN). Paratypes NEW CALEDONIA: 2 ♂♂, 1 ♀, same data of the holotype (MNHW). Description of the holotype (♂) Body quite thickset, moderately elongate and convex; LB = 2.72 mm; maximum pronotal width at base (WP = 0.93 mm); maximum elytral width at basal third (WE = 1.28 mm). Dorsum dark bronze, metallic. Frons and vertex microreticulate and densely punctate; head grooves moderately impressed, not continued to postantennal region; genae and frontal carina short; antennae slightly longer than ½ body length (LAN = 1.73 mm; LAN/ LB = 0.63), brown, slightly paler basally; LA: 100:64:64:73:91:91:100:100:100:91:127. Pronotum trapezoidal, clearly transverse (LP = 0.53 mm; WP/LP= 1.76), laterally straight (Fig. 4E); anterior angles slightly prominent, obliquely beveled; antebasal transverse sulcus strongly impressed, straight; lateral fovea moderately impressed; pronotal punctuation small and shallow, dense, evenly distributed on the densely microreticulate surface. Elytra moderately elongate (LE = 2.00 mm; WE/LE = 0.64), laterally moderately arcuate; punctuation quite small but clearly larger than on pronotum, strongly impressed; interstriae microreticulate and micropunctuate. Legs brownish, with darkened femora; first pro- and mesotarsomeres distinctly dilated; adhesive setae present on ventral side of first pro-, meso- and, partially, metatarsomeres. Venter brown; last abdominal ventrite laterally clearly incised, without special preapical impressions. Median lobe of aedeagus (LAED = 1.25 mm; LE/ LAED = 1.59) (Fig. 9C) slender in ventral view, laterally subparallel, slightly narrower at middle and preapical part; apex acute, slightly rounded, with large, apically rounded median tooth; ventral surface with complete, moderately deep ventral sulcus; in lateral view, median lobe curved at basal half, then straight; dorsal ligula long about half of median lobe, fusiform, quite narrow. Biometry Male (n = 3; range): 1.93 Ĺ LE Ĺ 2.00 mm; 1.25 Ĺ WE Ĺ 1.30 mm; 0.51 Ĺ LP Ĺ 0.55 mm; 0.85 Ĺ WP Ĺ 0.93 mm; 1.68 Ĺ LAN Ĺ 1.73 mm; 1.22 Ĺ LAED Ĺ 1.25 mm; 2.63 Ĺ LB Ĺ 2.72 mm; 3.61 Ĺ LE/LP Ĺ 3.81; 1.38 Ĺ WE/WP Ĺ 1.47; 1.66 Ĺ WP/LP Ĺ 1.76; 0.64 Ĺ WE/LE Ĺ 0.65; 0.62 Ĺ LAN/LB Ĺ 0.65; 1.58 Ĺ LE/ LAED Ĺ 1.62. Paratypes (♂) very similar in shape, sculpture and color to the holotype. Female (n = 1): LE = 1.86 mm; WE = 1.25 mm; LP = 0.50 mm; WP = 0.85 mm; LAN = 1.45 mm; LB = 2.66 mm; LE/LP = 3.73; WE/WP = 1.47; WP/LP = 1.70; WE/LE = 0.67; LAN/LB = 0.55. Spermatheca not detected. Distribution Endemic to Mt Humboldt, Southern Grande Terre (Fig. 14B). Ecological notes Collected in montane maquis at 1400 m a.s.l. No information is available about host plants.

Published as part of Samuelson, Allan & Biondi, Maurizio, 2016, Taxonomic revision of the genus Arsipoda Erichson, 1842 (Coleoptera, Chrysomelidae) in New Caledonia, pp. 1-61 in European Journal of Taxonomy 230 on pages 30-31, DOI: 10.5852/ejt.2016.230, http://zenodo.org/record/3840408