Procaryotic Genera Domain "Bacteria" Woese et al. 1990 Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005 Class "Gammaproteobacteria" nom. inval. see Class Gammaproteobacteria Garrity et al. 2005 Order "Xanthomonadales" [monotypic] see Order Xanthomonadales Saddler and Bradbury 2005 Family "Xanthomonadaceae" see Family Xanthomonadaceae Saddler and Bradbury 2005 1 Genus Xanthomonas Dowson 1939 (Approved Lists 1980) 2 Genus Frateuria Swings et al. 1980 3 Genus Luteimonas Finkmann et al. 2000 4 Genus Lysobacter Christensen and Cook 1978 (Approved Lists 1980) 5 Genus Nevskia Famintzin 1892 (Approved Lists 1980) 6 Genus Pseudoxanthomonas Finkmann et al. 2000 7 Genus Rhodanobacter Nalin et al. 1999 8 Genus Stenotrophomonas Palleroni and Bradbury 1993 9 Genus Xylella Wells et al. 1987