Taxonomic history

Xyleborus yakushimanus Murayama, 1955: 83.

Arixyleborus yakushimanus (Murayama): Nobuchi, 1985: 28.

Diagnosis

2.0−2.2 mm long (mean = 2.08 mm; n = 5); 2.5−2.75 times as long as wide. This species is distinguished by the protibia posterior face inflated and granulate; antennal club broader than tall; posterolateral carina costate; pronotum lateral margin distinctly costate, nearly carinate; pronotum anterior margin elevated with a row of serrations; strial furrows equal in width to interstrial ridges on disc; interstrial ridges glabrous or with minute setae no longer than ½ with of a strial furrow; interstrial ridges finely tuberculate; striae moderately impressed; elytral declivity strongly shagreened; and moderate size.

May be confused with

Arixyleborus grandis, A. malayensis, and A. tuberculatus

Distribution

China (Fujian, Sichuan, Xizang, Yunnan), India (Bihar, West Bengal), Japan, Laos, Taiwan, Thailand, Vietnam

Host plants

recorded from Castanopsis (Fagaceae) and Machilus (Lauraceae) (Yin et al. 1984)

DNA data

Sequences available for COI and CAD.

COI: MN619859MN619860MN619861MN619862

CAD: MN620150MN620151MN620152