[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Alphaproteobacteria Garrity et al. 2006
         Order Rhizobiales Kuykendall 2006
           Family Hyphomicrobiaceae Babudieri 1950 (Approved Lists 1980)
             Genus Hyphomicrobium Stutzer and Hartleb 1898 (Approved Lists 1980)
               [Hyphomicrobium facile] corrig. Hirsch 1989
                 Hyphomicrobium facile subsp. ureaphilum corrig. Hirsch 1989