Ceresium huedepohli, Yokoi, 2019

Ceresium huedepohli View in CoL sp. nov.

Figs 5 View Fig , 17A- I

Types. Holotype Ƌ: “Espana, Sibuyan Is., Romblon, Philippines ” 1979-1980, P. Witzgall et local collector leg. ( ZSM) . – Paratypes: 3 ƋƋ, 1 ♀, ditto ( ZSM) .

Diagnosis. Small-sized, fulvous. Head and pronotum extensively punctured and clothed with pale, stout disorderly hairs. Pronotal sides distinctly and evenly arcuate. Femora flattened, clavate without peduncle.

Etymology. The name of this species is dedicated to late Dr. Karl-Ernst Hüdepohl, to honour his contribution to the understanding of cerambycid fauna of the Oriental region.

Description

Measurements for male. TL =7.4-8.0 mm; EL/EW = 2.95-3.05 (M 2.94); HW/PW = 0.93-1.0 (M 0.98); PL/PW = 1.12-1.20 (M 1.15); PA/PW = 0.71-0.75 (M 0.72); PB/PW =0.76-0.80 (M 0.79). Ditto for female. TL= 8.5 mm; EL/EW= 2.94; HW/HP =0.98; PL/PW = 1.12; PA/PW =0.70; PB/PW= 0.76.

Colour. Brown to yellowish brown. Elytra, legs and antennae paler in some individuals.

Head. Slightly narrower than pronotum, shiny and clothed with pale, short, stout and disorderly hairs. Frons transversally rectangular, flattened, provided rather densely with large regular punctures. Vertex very broad, moderately concave. Eyes large, separated from one another by half the length of occiput. Occiput densely provided with medium-sized punctures. Antennal supports dorsally rather flattened. Antennae moderate in length, surpassing elytral apices by the last article. Scape about 1.4 × longer than article 3 and 4; moderately arcuate and clavate. Articles 1-4 finely punctured; each fringed with longer hairs on the undersides and at apex.

Pronotum. Distinctly longer than wide; base a little wider than apex; widest just before the middle; lustrous; almost universally and regularly provided with medium to large-sized punctures; clothed with pale, short, stout, and disarrayed hairs. Sides distinctly, almost evenly, arcuate. Disc a little flattened in the basal half; provided with a naked post-median stripe; with a pair of shorter, oblique elevations on each sided of the median stripe.

Scutellum semi-triangular, clothed with several short recumbent hairs.

Elytra. Sub-parallel-sided; shiny and rather densely provided with setiferous punctures of medium size; finer so near apex. Apices almost jointly rounded.

Legs. Short and stout, clothed moderately with erect hair of medium length. Femora flattened, clavate from the base on, without peduncle.

Venter. Shiny.Prosternum well convex; densely and extensively provided with punctures of varying sizes; clothed with pale hairs near sides. Prosternal process very narrow, truncated on apex. Mesosternum punctured and haired as prosternum, though the punctures smaller and hairs thicker; apical margin thickly bordered. Mesosternal process flat and broad, weakly and widely emarginated on apex; densely punctured. Metasternum finely punctured on each side of the shiny median stripe; clothed sparsely with pale, short, recumbent hairs; more densely so near sides.

Abdomen. Obtusely punctured. Hairs as on metasternum. 5 th sternite trapezoidal.

Genital organs as in Figure 17A- I. Median lobe nearly half as long as abdomen; bullet-shaped in dorsal view, slender and moderately arcuate in profile; dorsal plate dehiscent in basal 3 / 5; ventral plate distinctly longer than dorsal plate, dehiscent in basal 3 / 4. Tegmen about 6 / 7 as long as median lobe; widest near the apical third; weakly double-sinuate in profile. Parameres 1 / 3 the length of tegmen, dehiscent in the apical third; apicad irregularly punctured, clothed with short to medium hairs on apex. Ejaculatory duct complex as in Figure 17F- H; somewhat tegmen-like in outline; very slender; bent sharply downward at apical 1 / 3; apical and basal sclerites thin and narrow, both apicad extensively dehiscent. 8 th sternite very broad, widely and moderately emarginated on apex, which is clothed with middle to long setae. 8 th tergite a little wider than the corresponding sternite, bell-shaped; clothed with medium to long setae on apex.

Distribution. Sibuyan Island, Philippines.

Comparative notes. This new species is distinguishable by colour, characteristic form of pronotum

and legs, as well as by the integument on head and pronotum. It can be compared to C. promissum Dillon & Dillon, 1952 from Fiji Island. It obviously differs, however, regarding body hair, integument of pronotum and the proportion of antennal segments. As for male genital organs, the 8 th sternite is much wider and more widely emarginated on apex than those of the other species examined.Ejaculatory duct complex is remarkably slender and extraordinarily curved in lateral view.