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 Xyleborus affinis Eichhoff, 1868 Xyleborus atratus Eichhoff, 1875 Xyleborus californicus Wood, 1975 - may belong in Cyclorhipidion Xyleborus celsus Eichhoff, 1868 Xyleborus cryptographus (Ratzeburg, 1837) Xyleborus dispar (Fabricius, 1792) Xyleborus dryographus (Ratzeburg, 1837) Xyleborus eurygraphus (Ratzeburg, 1837) Xyleborus ferrugineus (Fabricius, 1801) Xyleborus glabratus Eichhoff, 1877 Xyleborus horridus Eichhoff, 1869 Xyleborus impressus Eichhoff, 1868 Xyleborus intrusus Blandford, 1898 Xyleborus inurbanus (Broun, 1880) Xyleborus monographus (Fabricius, 1792) Xyleborus obesus LeConte, 1868 Xyleborus pelliculosus Eichhoff, 1878 - may belong in Cyclorhipidion Xyleborus perforans (Wollaston, 1857) Xyleborus pfeilii (Ratzeburg, 1837) Xyleborus planicollis Zimmermann, 1868 Xyleborus pubescens Zimmermann, 1868 Xyleborus sayi (Hopkins, 1915) Xyleborus similis Ferrari, 1867 Xyleborus viduus Eichhoff, 1878 Xyleborus volvulus (Fabricius, 1775) Xyleborus xylographus (Say, 1826) See also List of Xyleborus species Footnotes References (2004): PEET Xyleborini - Xyleborus species list. Retrieved 2008-JUL-08. Scolytinae