Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae) Author Pace, R. text Linzer biologische Beiträge 2014 2014-07-31 46 1 727 794 journal article 10.5281/zenodo.5306753 0253-116X 5306753 6EB57FAF-A54D-4A33-AB58-C03E7294FA00 Chaetosogonocephus minor nov.sp. ( Figs 19 and 106-107 ) 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). Paratype : 1, same provenance as the holotype (CROU). D e s c r i p t i o n: Length 1.84-1.96 mm . Body shiny, brown, sides of the pronotum, humeral angles of elytra, posterior margins of the free abdominal tergites and pygidium reddish, antennae and legs yellowish-red. Second antennomere shorter than the first, third as long as the second, fourth to tenth strongly transverse, eleventh as long as the seven preceding antennomeres taken together. Eyes very large in dorsal view. Body devoid of reticulation. Puncturation of the head little evident, very superficial and absent on the longitudinal median band. Granulation of pronotum and elytra fine and very superficial, absent on the longitudinal median band and near the posterior margin of the pronotum. Free abdominal tergites impunctate and devoid of granulation. Male fifth free tergite with posterior median striae, male sixth free tergite densely punctate. Aedeagus: Figs 106-107. C o m p a r a t i v e n o t e s: In the length of the eleventh antennomere, the new species is similar to C. notaticornis PACE, 2008 also from Borneo, but the aedeagus is 0.2 mm long, while that of C. notaticornis measures 0.25 mm . The ventral profile of the aedeagus of the new species is slightly curved, while is clearly curved in C. notaticornis . The internal sclerotised piece of the aedeagus of the new species is short, whereas it is very long in C. notaticornis . E t y m o l o g y: The new species is called "smaller" for its small body size in comparison with the species described above.