Chaetosogonocephus luteicollis Pace 2014, nov.sp

Chaetosogonocephus luteicollis nov.sp. (Figs 22 and 112-113) 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 1.93-2 mm. Body shiny, yellowish-red, head reddish, posterior half of the elytra brown, antennae reddish-brown with the two basal antennomeres yellow, legs reddish. Second antennomere shorter than the first, third longer than the second, fourth as long as wide, fifth to tenth transverse, eleventh as long as the two preceding antennomeres together. Eyes very large in dorsal view. Body devoid of reticulation or granulation. Puncturation of the head indistinct. Granulation of the pronotum superficial and sparse, that of the elytra salient and sparse. Free abdominal tergites impunctate and devoid of granulation. Male and female fourth free tergite with postero-lateral striae, fifth free tergite with longitudinal striae on the entire surface, sixth free tergite with strong and very superficial Puncturation, and with four striae posteriorly. Aedeagus: Figs 112-113; spermatheca: Fig. 111. C o m p a r a t i v e n o t e s: The aedeagus of this new species is broadly curved to the ventral side as in C. notaticornis PACE, 2008 also from Borneo, but the eleventh antennomere is as long as the three preceding antennomeres together, and not as long as the six preceding antennomeres as in C. notaticornis. The internal sclerotised piece of the aedeagus of the new species is short (0.1 mm), whereas in C. notaticornis it measures 0.15 mm. The colour of the body of C. notaticornis is uniformly yellowish-red, while in the new species it is reddish-brown with yellow pronotum. E t y m o l o g y: The new species is named "yellow neck" in reference to its reddishyellow pronotum.
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 744, DOI: 10.5281/zenodo.5306753