Arixyleborus silvanus Smith, Beaver & Cognato, 2020a

New records. CHINA: Fujian, Putian City, Xianyou Co., Jiuli Lake, 25.454N, 118.819E, 410m, ex Castanopsis chinensis, 6.viii.2020, Zhang, L., Cao Y-F. (1, RABC) . VIETNAM: Tam Dao N.P., 13.III.2016, M. Jusino, in flight, UFFE 11620 (1, MSUC; 1, UFFE) .

Distribution. China (Fujian *, Guangxi, Hainan), Thailand, Vietnam *.

Remarks. The species was previously recorded only from Liquidambar formosana (Altingiaceae) (Smith et al. 2020a). Castanopsis chinensis (Fagaceae) is a new host record.