A specimen of an unidentified, live bostrichid beetle was detected by Jiangmen Customs on Pterocarpus erinaceus logs imported from Gambia. The species identification was carried out by observation and measurement of micro-morphological characteristics. This insect was identified as Sixnoxylon cuneolus (Coleoptera; Bostrichidae). The main difference between S. cuneolus and similar species is that the hair on the apical declivity of elytra is sparse and not obvious, but it was erect short hair at the apices; the base of the teeth on the suture side was not rough; there were three pairs of callose marks on the upper edge of the apical declivity. So far, there have been no reports of occurrence of this species on mainland China. S. cuneolus generally spreads over long distances with logs, wood products and packaging. The species poses substantial threat to the agricultural and forestry sectors in China. The quarantine inspection of imported logs, wood products and wooden packaging at ports should be made aware of this potential threat.