Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Rhizobiales Kuykendall 2006
                     Family Rhizobiaceaeᵀ Conn 1938 (Approved Lists 1980)
                       Genus Methylobrevis Poroshina et al. 2015
                       1.1 Genus Rhizobiumᵀ Frank 1889 (Approved Lists 1980)
                       1.2 Genus Neorhizobium Mousavi et al. 2015
                       2 Genus Sinorhizobium Chen et al. 1988 [monotypic]
                       3 Genus Carbophilus Meyer et al. 1994 [monotypic]
                       4.1 Genus Ensifer Casida 1982
                       4.2 Genus Ciceribacter Kathiravan et al. 2013 [monotypic]
                       5 Genus Kaistia Im et al. 2005
                       6 Genus Shinella An et al. 2006