Dryoxylon


Diagnosis

A recently described and monospecific genus of the subtribe Dryocoetina. This genus is similar to Dendrocranulus Schedl; it can be separated from the Xyleborina by the absence of a depressed pregular region. It can be distinguished from the other Dryocoetina by the notch on the anterior margin of the pronotum.


Description

The only species in this genus ranges from 1.9 to 2.3 mm in length with a body proportion of 3.3 times long as wide. The coloration is yellowish brown. The pronotum is longer than wide and asperate on the anterior third, and it is distinctly notched at the middle of the anterior margin. The scutellum is small and flush with the elytra. The declivity is sulcate and unarmed. The vestiture consists of erect yellowish hair-like setae which is more abundant on the declivity. The pregular area is not depressed. The anterior margin of the compound eye is emarginate. The scape is longer than the 5-segmented funicle. The club is obliquely truncate, without any indication of sutures. The precoxae are contiguous.


Distribution

Asia, introduced to eastern USA


World fauna

Number of species: 1, Native species: 0, Introduced species: 1


Established exotic species

Dryoxylon onoharaensis is present in Delaware, Maryland, North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana, and Texas.


Hosts

Acer, Quercus