life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Superkingdom Prokarya see Domain Bacteria Woese et al. 1990 Kingdom Bacteria (Cohn 1870) Cavalier-Smith 1983 - bacteria see Kingdom Bacteria Cavalier-Smith 2002 Subkingdom Eubacteria Cavalier-Smith 1981 see Domain Bacteria Woese et al. 1990 Division Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980) see Phylum Gracilicutes Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005 "Beta Group" see Class Betaproteobacteria Garrity et al. 2006 1 Genus Alcaligenes Castellani and Chalmers 1919 (Approved Lists 1980) 2 Genus Neisseria Trevisan 1885 (Approved Lists 1980) 3 Genus Nitrosomonas Winogradsky 1892 (Approved Lists 1980) 5 Genus Spirillum Ehrenberg 1832 (Approved Lists 1980) 6 Genus Thiobacillus Beijerinck 1904 (Approved Lists 1980) 8 "Aggregated Bacteria" see Order Burkholderiales