Procaryotic Genera Domain "Bacteria" Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024 Phylum Proteobacteria Garrity and Holt 2001 nom. nud. see Phylum Proteobacteria Garrity et al. 2005 stat. inval. Class "Gammaproteobacteria" "Garrity and Holt 2001" nom. nud. see Class Gammaproteobacteria Garrity et al. 2005 Order Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980) Family Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980) Genus Azotobacter Beijerinck 1901 (Approved Lists 1980)