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 Rhizobiaceae Conn 1938 (Approved Lists 1980)
             1 Genus Rhizobium Frank 1889 (Approved Lists 1980)
             2 Genus Agrobacterium Conn 1942 (Approved Lists 1980) see Genus Rhizobium Frank 1889 (Approved Lists 1980)
             3 Genus Carbophilus Meyer et al. 1994
             4 Genus Chelatobacter Auling et al. 1993 see Genus Aminobacter Urakami et al. 1992
             5 Genus Ensifer Casida 1982
             6 Genus Sinorhizobium Chen et al. 1988