Pachycorynus kinabaluensis, Bordoni, 2017

Bordoni, Arnaldo, 2017, New data on the Oriental Xantholinini. 44. New species and new records from Nepal, Malaysia, Vietnam, Philippines, Sumatra, and Sabah (Coleoptera Staphylinidae), Beiträge Zur Entomologie = Contributions to Entomology 67 (2), pp. 255-264 : 257

Pachycorynus kinabaluensis spec. nov.

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( Figs 7-9 , 30 )

Examined material: Holotype ♂: Borneo, Sabah, Kinabalu Mt., Headquarters env ., 1600 m, Zhou 16.IV.2015 ( cB); paratypes: same data, 2 ♀♀ (cB).

Description: Length of body 3.5 mm; from anterior margin of head to posterior margin of elytra: about 1.8 mm. Head without lateral grooves. Body ( Fig. 30 ) slightly convex, light yellowish brown, with darker elytra. Head sub-rectangular, slightly longer than wide, with sub-parallel and sub-rectilinear sides and strictly rounded posterior angles. Eyes medium-sized and slightly protruding. Surface of head with polygonal microreticulation and evident, dense punctation, except of median stripe. Pronotum shorter and distinctly narrower than head, with oblique anterior margins, rounded anterior angles and slightly sinuate sides. Surface with numerous punctures, except of median stripe. Elytra very longer and wider than pronotum, sub-rectangular, with marked humeral angles. Surface with very fine, dense punctation. Abdomen with more or less polygonal microreticulation and fine, very sparse punctation.

Tergite and sternite of the male genital segment as in Figs 7-8 . Aedeagus ( Fig. 9 ) with short basal bulb; distal portion 0.33 mm long, with rounded apex; parameres very narrow, as long as median lobe; inner sac apparently not visible.

Etymology: The specific epithet refers to the type locality.

Distribution: The species is known only from the type locality.

Remarks: This species differs from P. fuscoelytratus BORDONI, 2004 from Kinabalu Nat. Park by a little larger body, polygonal micro-reticulation and not transverse micro-striation on abdomen, and especially by the different shapes of tergite and sternite of the male genital segment and aedeagus.

Figures

Figs 1–12: Tergite and sternite of the male genital segment and aedeagus of Pachycorynus sabahensis spec. nov. (1–3), P. balaneion

Figs 28–31: Habitus of Pachycorynus sabahensis spec. nov. (total lenght 5.4 mm) (28), P. balaneion spec.nov. (total lenght: 5 mm) (29) P. kinabaluensis spec. nov. (total lenght: 3.5 mm) (30) and Pachycorynus danum spec. nov. (total lenght: 3.5 mm) (31) (photo: S. Cuoco).