Dryoxylon is superficially similar to Cyclorhipidion which also has elongate species with a setose declivity but can be distinguished by the unique pronotum described above. Dryoxylon may also be confused with Dryocoetini because of the reduced number of socketed denticles on the pro- and metatibia (5).
Known only from China, Japan and South Korea. Introduced and established in USA.
Unknown. The biology of the only species in the genus, D. onoharaensehas been investigated in the USA. Bright and Rabaglia (1999) reported reported D. onoharaensein the xylem associated with other xyleborines, but galleries solely containing this species were not found. Bateman et al. (2015) examined the fungal associates of D. onoharaensein Florida. The authors were unable to locate a mycangium or isolate fungi from the species. This suggests that the species is not engaged in typical fungus farming but may be entering established galleries of other ambrosia beetles rather than establishing their own, similar to the Neotropical genus Sampsonius. The species could also be mycocleptic similar to Diuncus which steal fungi from nearby galleries (Bateman et al. 2015, Hulcr and Cognato 2010b).