Hello there. Unfortunately I have no additional data to go on. I will get a close up of the pronotum tomorrow. I will search in Monochamus for the time being, thanks.
No data except "Borneo"? Very unfortunate. Is that even reliable? If Breuning described it, he could have created another genus!! It is not a described species from Borneo, however there are Sumatran and west Malaysian species which have not yet been recorded from there