Metolinus vulcanalis, 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 : 258

Metolinus vulcanalis spec. nov.

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( Figs 16-18 ,33)

Examined material: Holotype ♂: N Sumatra, Gn. Sibayak , 1500 m, Li 15.II.2015 ( cB).

Description: Length of body 4.4 mm; from anterior margin of head to posterior margin of elytra: 2.3 mm. Small, nice species (Fig. 33), characterized by large and protruding eyes, reddish brown body, with yellowish posterior half of pronotum, long and sub-rectangular elytra. Antennae and legs yellowish. Head sub-rectangular, narrow anteriad, with rounded posterior angles. Eyes large and protruding. Surface of head shiny, with very few, evident punctures. Pronotum sub-rectangular, narrow, narrower and longer than head, with slightly oblique anterior margins, rounded anterior angles and not sinuate sides. Surface with dorsal series of 5 fine and scattered punctures and lateral series of 3 anterior punctures. Elytra sub - rectangular, not dilated posteriad, very long, longer and wider than pronotum, with conspicuous humeral angles. Surface with three series of very fine punctures, one juxtasutural, one median and one lateral. Abdomen without micro-sculpture, with fine and very sparse punctation.

Posterior margin of the sixth visible sternite with a short, median lobule. Tergite and sternite of the male genital segment as in Figs 16-17 . Aedeagus ( Fig. 18 ) 0.27 mm long, ovoid, with short parameres; inner sac with numerous subsequent spines.

Etymology: The specific epithet is the Latin vulcanalis- e, in relation to the Sibayak volcano.

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

Remarks: Based on external characters the new species is close to M. heuresilogus BORDONI, 2002 from Thailand and M. apomontis BORDONI, 2002 from the Philippines from which it is easily distinguished by the structure of the inner sac of the aedeagus.

Figures

Figs 13–27: Tergite and sternite of the male genital segment and aedeagus of Pachycorynus lanceolatus spec. nov. (13–15), Metolinis vucanalis spec. nov. (16–18), Metolinis jubing spec. nov. (19–21) (scale bar: 0.1 mm), Phacophallus philippinus spec. nov. (22–24), and Medhiama nepalica spec. nov. (25–27) (scale bar: 0.1 mm).