Taxonomic history

Xyleborus octiesdentatus Murayama, 1931: 46.

Xyleborinus octiesdentatus (Murayama): Beaver et al., 2008: 234.


2.5−2.65 mm long (mean = 2.55 mm; n = 5); 2.79−3.13 times as long as wide. This species is distinguished by the posterior margin of elytra broadly rounded; declivital face with interstriae 1 and 2 unarmed by tubercles; elytral declivital face moderately sulcate; large body size; lateral declivital margins elevated, bearing 4−6 pairs of long, narrow, sharply pointed spines (often asymmetric), increasing in length from base to apex; sulcate area of declivity smooth, shining; and elongate body form.

May be confused with

Xyleborinus artestriatus, X. echinopterus, X. ephialtodes, X. schaufussi, X. speciosus, and X. spinipennis


China (Sichuan), Japan, South Korea, Vietnam; imported and established in USA (Rabaglia et al. 2010, Gomez et al. 2018a)

Host plants

recorded from Carpinus (Betulaceae), Cleyera and Eurya (Theaceae), and Illicium (Illiciaceae) (Wood and Bright 1992)

DNA data

Sequences available for COI and CAD.

COI: MN620027

CAD: MN620295