Xyleborus (beetle)
Xyleborus is by far the largest ambrosia beetle genus in the tribe Xyleborini, with over 500 species.
Xyleborus nowadays includes a number of formerly independent genera. In addition, the genera Coptoborus, Cryptoxyleborus and Euwallacea are often included here, too; this may be correct, as they seem to be closely related. Less often, Ambrosiodmus, Premnobius and Xyleborinus are included in Xyleborus, but they seem to be well distinct; Premnobius might even not belong to the Xyleborini at all.
The different species can be best differentiated by the gallery burrows they build and the tree species they infest. A significant member, X. dispar, causes pear blight.
Selected species
[Image:Xyleborus.dispar.-.calwer.29.26.jpg|thumb|right|200px|X. dispar][Image:Xyleborus.monographus.-.calwer.29.25.jpg|thumb|right|200px|X. monographus]
Source:Xyleborus affinis Eichhoff, 1868Xyleborus atratus Eichhoff, 1875Xyleborus californicus Wood, 1975 - may belong in CyclorhipidionXyleborus celsus Eichhoff, 1868Xyleborus cryptographus Xyleborus dispar Xyleborus dryographus Xyleborus eurygraphus Xyleborus ferrugineus Xyleborus glabratus Eichhoff, 1877Xyleborus horridus Eichhoff, 1869Xyleborus impressus Eichhoff, 1868Xyleborus intrusus Blandford, 1898Xyleborus inurbanus Xyleborus monographus Xyleborus obesus LeConte, 1868Xyleborus pelliculosus Eichhoff, 1878 - may belong in CyclorhipidionXyleborus perforans Xyleborus pfeilii Xyleborus planicollis Zimmermann, 1868Xyleborus pubescens Zimmermann, 1868Xyleborus sayi Xyleborus similis Ferrari, 1867Xyleborus viduus Eichhoff, 1878Xyleborus volvulus