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 Ensifer Casida 1982
                         01 Ensifer adhaerensᵀ Casida 1982
                         02 Ensifer arboris (Nick et al. 1999) Young 2003
                         03 Ensifer fredii (Scholla and Elkan 1984) Young 2003
                         04 Ensifer garamanticus Merabet et al. 2010
                         05 Ensifer kostiensis (Nick et al. 1999) Young 2003
                         06 Ensifer kummerowiae (Wei et al. 2002) Young 2003
                         07 Ensifer medicae (Rome et al. 1996) Young 2003
                         08 Ensifer meliloti (Dangeard 1926) Young 2003
                         09 Ensifer mexicanus Lloret et al. 2011
                         10 Ensifer numidicus Merabet et al. 2010
                         11 Ensifer saheli (De Lajudie et al. 1994) Young 2003
                         12 Ensifer sojae Li et al. 2011
                         13 Ensifer terangae (De Lajudie et al. 1994) Young 2003
                         14 Ensifer xinjiangensis (Chen et al. 1988) Young 2003