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.
Cyclorhipidion neocavipenne and C. xeniolum
China (Yunnan), Japan, Russia (Far East), South Korea, Thailand
recorded only from Castanopsis and Quercus (Fagaceae) (Nobuchi 1981a)
specimens not available for sequencing