[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 Hyphomicrobiaceae Babudieri 1950 (Approved Lists 1980)
             Genus Hyphomicrobium Stutzer and Hartleb 1899 (Approved Lists 1980)
               01 Hyphomicrobium vulgare Stutzer and Hartleb 1898 (Approved Lists 1980)
               02 Hyphomicrobium aestuarii Hirsch 1989
               03 Hyphomicrobium chloromethanicum McDonald et al. 2001
               04 Hyphomicrobium coagulans (ex Takada 1975) Hirsch 1989
               05 Hyphomicrobium denitrificans Urakami et al. 1995
               06 [Hyphomicrobium facile] corrig. Hirsch 1989
               07 Hyphomicrobium hollandicum Hirsch 1989
               08 Hyphomicrobium methylovorum Izumi et al. 1983
               09 Hyphomicrobium sulfonivorans Borodina et al. 2002
               10 Hyphomicrobium zavarzinii Hirsch 1989