[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021
       Class Alphaproteobacteria Garrity et al. 2006
         Order Rhizobiales Kuykendall 2006 see Order Hyphomicrobiales Douglas 1957 (Approved Lists 1980)
           Family Bradyrhizobiaceae Garrity et al. 2006 see Family Nitrobacteraceae corrig. Buchanan 1917 (Approved Lists 1980)
             01 Genus Bradyrhizobium Jordan 1982
             02 Genus Afipia Brenner et al. 1992
             03 Genus Agromonas Ohta and Hattori 1985 see Genus Bradyrhizobium Jordan 1982
             04 Genus Balneimonas corrig. Takeda et al. 2004 see Genus Microvirga Kanso and Patel 2003
             05 Genus Blastobacter Zavarzin 1961 (Approved Lists 1980)
             06 Genus Bosea Das et al. 1996 nom. illeg. see Genus Allobosea Deshmukh and Oren 2026
             07 Genus Nitrobacter Winogradsky 1892 (Approved Lists 1980) nom. cons.
             08 Genus Oligotropha Meyer et al. 1994 see Genus Afipia Brenner et al. 1992
             09 Genus Rhodoblastus Imhoff 2001
             10 Genus Rhodopseudomonas Czurda and Maresch 1937 (Approved Lists 1980) nom. cons.