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 01 Order "Chromatiales" Garrity et al. 2001 nom. ined. see Order Chromatiales Imhoff 2005 02 Order Acidithiobacillales Garrity et al. 2001 nom. ined. see Order Acidithiobacillales Garrity et al. 2005 03 Order "Xanthomonadales" [monotypic] see Order Xanthomonadales Saddler and Bradbury 2005 04 Order "Cardiobacteriales" nom. inval. [monotypic] see Order Cardiobacteriales Garrity et al. 2005 05 Order "Thiotrichales" see Order Thiotrichales Garrity et al. 2005 06 Order "Legionellales" Garrity and Holt 2001 nom. nud. see Order Legionellales Garrity et al. 2005 07 Order "Methylococcales" nom. inval. [monotypic] see Order Methylococcales Bowman 2005 08 Order "Oceanspirillales" see Order Oceanospirillales Garrity et al. 2005 09 Order Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980) 10 Order "Alteromonadales" Garrity et al. 2001 nom. ined. [monotypic] see Order Alteromonadales Bowman and McMeekin 2005 11 Order "Vibrionales" Garrity & Holt, 2001 [monotypic] 12 Order "Aeromonadales" Garrity and Holt 2001 nom. nud. see Order Aeromonadales Martin-Carnahan and Joseph 2005 13 Order "Enterobacteriales" Garrity and Holt 2001 nom. nud. [monotypic] 14 Order "Pasteurellales" [monotypic] see Order Pasteurellales Garrity et al. 2005