[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 Rhizobiaceae Conn 1938 (Approved Lists 1980)
             Genus Ensifer Casida 1982
               01 Ensifer arboris (Nick et al. 1999) Young 2003
               02 Ensifer adhaerens Casida 1982
               03 Ensifer fredii (Scholla and Elkan 1984) Young 2003
               04 Ensifer kostiensis (Nick et al. 1999) Young 2003
               05 Ensifer kummerowiae (Wei et al. 2002) Young 2003
               06 Ensifer medicae (Rome et al. 1996) Young 2003
               07 Ensifer meliloti (Dangeard 1926) Young 2003
               08 Ensifer saheli (De Lajudie et al. 1994) Young 2003
               09 Ensifer terangae (De Lajudie et al. 1994) Young 2003
               10 Ensifer xinjiangensis (Chen et al. 1988) Young 2003