Thank you. The beetle corresponds to the original description of Pseudostixis flavifrons: the forehead is covered with fine yellow pubescence (see the species name), pronotum is almost without punctures (still a few larger points are found in marginal parts), the third antennal segment is very long.
I would vote for Pseudostixis flavifrons, although I did not see the description of P. kivuensis yet. I don't have this paper.