Chaetosogonocephus danumensis, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 744

Chaetosogonocephus danumensis nov.sp. ( Figs 21 and 109-111 )

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 2.34-2.36 mm. Body Shiny, yellowish-red, antennae brown with the two basal antennomeres and base of the third pale yellow, legs yellowish-red. Second antennomere as long the first, third shorter than the second, fourth to ninth antennomeres strongly transverse, tenth weakly transverse, eleventh as long as the two and a half preceding antennomeres together. Eyes very large in dorsal view. Body devoid of reticulation or granulation. Puncturation of the head very superficial, denser between the antennae and the eye, largely absent on the longitudinal median band and occipital area. Granulation of pronotum and elytra salient, fine and sparse. Free abdominal tergites impunctate and devoid of granulation. Male fifth free tergite with strong and dense puncturation, male sixth free tergite with strong puncturation and very superficial only on the basal half, sparse posteriorly. Aedeagus: Figs 109-110 ; spermatheca: Fig. 111.

C o m p a r a t i v e n o t e s The new species is similar to C. kinabaluensis PACE, 2008 , also from Borneo, in the ventral profile of the aedeagus, but in ventral view the aedeagus of the new species is narrowed to the apex, while it is wide in C. kinabaluensis , and the antennae are brown with yellow base in the new species, while in C. kinabaluensis they are entirely yellow. The proximal portion of the spermatheca of the new species is folded in tight U shape, whereas in C. kinabaluensis the proximal portion of its spermatheca is merely slightly curved.

E t y m o l o g y: The new species takes its name from the Danum Valley.

Figures

Figs 13-24: Habitus. (13): Pelioptera plenitudinis nov.sp., scale bar 2.1 mm; (14): Pelioptera irregularis nov.sp., scale bar 3 mm; (15): Dikraspedella borneensis nov.sp., scale bar 2.5 mm; (16): Doryloxenus borneensis nov.sp., scale bar 1.5 mm; (17): Mesomegaskela rougemonti nov.sp., scale bar 5.3 mm; (18): Chaetosogonocephus nobilis nov.sp., scale bar 3 mm; (19): Chaetosogonocephus minor nov.sp., scale bar 1.9 mm; (20): Chaetosogonocephus ruficollis nov.sp., scale bar 3.6 mm; (21): Chaetosogonocephus danumensis nov.sp., scale bar 2.3 mm; (22): Chaetosogonocephus luteicollis nov.sp., scale bar 1.9 mm; (23): Malayloeblius borneensis nov.sp., scale bar 2.5 mm; (24): Rougemontius borneensis nov.sp., scale bar 3 mm.

Figs 101-116: Aedeagus in lateral and ventral view and spermatheca. (101-103): Mesomegaskela rougemonti nov.sp.; (104-105): Chaetosogonocephus nobilis nov.sp.; (106-107): Chaetosogonocephus minor nov.sp.; (108): Chaetosogonocephus ruficollis nov.sp.; (109-111): Chaetosogonocephus danumensis nov.sp.; (112-113): Chaetosogonocephus luteicollis nov.sp.; (114-116): Malayloeblius borneensis nov.sp. Scale bars: 0.1 mm.