Philanthaxia jakli Bílý & Nakládal 2011

Philanthaxia jakli is a species of beetle that was discovered in Indonesia on July, 2011. The beetle can be found in the Indonesian islands Sumatra, Borneo, and Lombok.

Head large, distinctly wider than anterior pronotal margin; frontoclypeus widely, shallowly emarginate, separated from frons by shallow, transverse depression; frons flat, vertex very wide, 5 times as wide as width of eye; eyes small, nearly elliptical, strongly projecting beyond outline of head; antennae long, slender, reaching posterior third of lateral pronotal margins when laid alongside; scape slender, slightly claviform, 5 times as long as wide; pedicel ovoid, slightly longer than wide; third antennomere weakly enlarged apically, 1.5 times as long as wide; antennomeres 4–10 obtusely triangular, about 1.3 times as long as wide; terminal antennomere rhomboid, nearly twice as long as wide; sculpture consisting of very fine, dense, polygonal to oval cells with lustrous bottom. Pronotum regularly convex with wide, shallow lateroposterior depressions, twice as wide as long; anterior margin shallowly biarcuate, posterior margin nearly straight; lateral margins nearly straight, very weakly emarginate anteriad sharp lateroposterior angles; maximum pronotal width at base; sculpture consisting of deep, dense punctures at posterior angles, fine, dense polygonal cells at anterior third and fine, dense, transverse rugae on disc and prescutellar portion. Scutellum lustrous, widely pentagonal, 2.2 times as wide as long. Elytra regularly convex, subparallel at anterior two thirds, narrowly tapering at posterior third, 2.1 times as long as wide; posterior third only indistinctly caudiform, very finely serrate; humeral swellings small; basal transverse depression developed only on humeri; elytral epipleura narrow, reaching posterior third of elytra; each elytron with eight fine striae, interstices with fine, dense, transverse rugae. Ventral surface lustrous, finely, densely ocellate; prosternal process flat, obtusely pointed apically; anal ventrite nearly flat, obtusely truncate apically, without distinct lateral serration. Legs long, slender, meso- and metatibiae straight. Tarsal claws thin, strongly hook-shaped, slightly enlarged at base. Aedeagus (Fig. 8) wide, flattened, parallel-sided; apical portion of parameres angulately rounded, median lobe widely pointed. Female unknown. Variability. The paratype possesses a more distinct golden tinge along the elytral margins, at the posterior pronotal angles and on the frons than the holotype. Measurements. Length 7.5 mm (holotype) and 8.0 mm (paratype); width: 2.6 mm (holotype), 2.9 mm (paratype).

Western Sumatra, prov. Aceh.