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Mesomegaskela rougemonti nov.sp. (Figs 17 and 101-103) T y p e m a t e r i a l Holotype, Sabah, Danum Valley, B.R.L., f.i.t., 14-16.II.2007, G. de Rougemont leg. (CROU). Paratypes: 5 exx., same provenance as the holotype (CROU, MSNV). D e s c r i p t i o n: Length 5-5.2 mm. Body shiny, reddish, head and elytra brown, antennae reddish-brown, legs reddish. The whole body covered in very superficial short and adherent, silky pubescence. Posterior margin of the elytra with eleven long bristles. Abdomen without reticulation and with fine and very superficial Puncturation. Posterior margin of each of the four basal free tergites with ten long bristles. Aedeagus: Figs 101- 102; spermatheca: Fig. 103. C o m p a r a t i v e n o t e s: In its habitus and the form of the spermatheca, the new species is similar to M. adesi PACE, 1999 from Hong Kong. It differs in the pronotum which has a length/width ratio of 0.85, in M. adesi 0.87, and above all in the form of the spermatheca. Whereas in M. adesi the proximal portion of the spermatheca is wound in four coils, in the new species the coils are more numerous (Fig. 103), and more convoluted. E t y m o l o g y: The new species is dedicated to its collector, our colleague, the staphylinid specialist Guillaume de Rougemont., Published as part of Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), pp. 727-794 in Linzer biologische Beiträge 46 (1) on page 740, DOI: 10.5281/zenodo.5306753