Procaryotic Genera
   Domain "Bacteria" Woese et al. 1990
     Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
       Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
         Order "Rhizobiales" see Order Rhizobiales Kuykendall 2006
           Family "Bradyrhizobiaceae" Garrity et al. 2001 nom. ined. see Family Bradyrhizobiaceae Garrity et al. 2006
             1 Genus Bradyrhizobium Jordan 1982
             2 Genus Afipia Brenner et al. 1992
             3 Genus Agromonas Ohta and Hattori 1985 see Genus Bradyrhizobium Jordan 1982
             4 Genus Blastobacter Zavarzin 1961 (Approved Lists 1980)
             5 Genus Bosea Das et al. 1996
             6 Genus Nitrobacter Winogradsky 1892 (Approved Lists 1980)
             7 Genus Oligotropha Meyer et al. 1994
             8 Genus Rhodopseudomonas Czurda and Maresch 1937 (Approved Lists 1980)