Taxonomic history

Xyleborus japonicus Nobuchi, 1981a: 153.

Cyclorhipidion japonicum (Nobuchi): Smith et al., 2018b: 394.


2.1−2.3 mm long (mean = 2.2 mm; n = 4); 2.81−3.5 times as long as wide. This species can be distinguished by the small size; declivity obliquely truncate, moderately to strongly sulcate; pronotum elongate from dorsal view (type 9); declivity laterally sulcate to interstriae 3, interstriae 3 bearing five tubercles along its length.

May be confused with

Cyclorhipidion neocavipenne and C. xeniolum


China (Yunnan), Japan, Russia (Far East), South Korea, Thailand

Host plants

recorded only from Castanopsis and Quercus (Fagaceae) (Nobuchi 1981a)

DNA data

specimens not available for sequencing