Genus Pseudoxanthomonas represents a relatively newly characterized group of gamma-proteobacterium of environmental origin. Species of the genus have very similar morphology to strains belonging to Xanthomonas, Xylella and Stenotrophomonas. However, the genome resource of this genus was largely unexplored. The species belonging to the genus are from a wide range of environmental sites including hydrocarbon polluted fields. Here, we have provided the whole genome sequence of all available type strains of the genus of Pseudoxanthomonas. In order to deduce the differences with closely related genera, we have employed the whole genome-based investigation of the type species of genus Pseudoxanthomonas.