Taxonomic history

Xyleborus onoharaensis Murayama, 1934: 293.

Dryoxylon onoharaense (Murayama): Bright and Rabaglia, 1999: 333.

Diagnosis

2.2−2.4 mm long (mean = 2.36 mm; n = 5); 3.14−3.43 times as long as wide. Like the genus, the species is most easily distinguished by the anterior margin of pronotum in lateral view evenly arched, summit not elevated or evident; anterior margin of pronotum weakly emarginated at middle; elytral declivity distinctly moderately deeply sulcate; and declivital face and lateral margins unarmed. Unlike nearly all other Xyleborini, the submentum is not impressed and there are comparatively fewer socketed denticles on the outer margin of the pro- (5), meso- (6), and metatibiae (5).

May be confused with

small Cyclorhipidion

Distribution

China (Guizhou, Sichuan), Japan, South Korea; introduced and established in USA (Rabaglia and Bright 1999, Gomez et al. 2018a)

Host plants

polyphagous; recorded from Abies (Pinaceae), Acer (Sapindaceae) (Bright and Rabaglia, 1999), Liriodendron tulipifera (Magnoliaceae) (Atkinson 2018), Populus (Salicaceae) (Coyle et al. 2005), Quercus (Fagaceae) (Murayama 1934)

Remarks

This species has been collected from both coniferous and angiosperm hosts.

DNA data

Sequences available for COI (from Jordal et al. 2000).

COI: AF187112.1