[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 Methylobacteriaceae Garrity et al. 2006
             Genus Methylobacterium Patt et al. 1976 (Approved Lists 1980)
               01 Methylobacterium organophilum Patt et al. 1976 (Approved Lists 1980)
               02 Methylobacterium adhaesivum Gallego et al. 2006
               03 Methylobacterium aminovorans Urakami et al. 1993
               04 Methylobacterium aquaticum Gallego et al. 2005
               05 Methylobacterium extorquens (Urakami and Komagata 1984) Bousfield and Green 1985
               06 Methylobacterium fujisawaense Green et al. 1988
               07 Methylobacterium hispanicum Gallego et al. 2005
               08 Methylobacterium isbiliense Gallego et al. 2005
               09 Methylobacterium mesophilicum (Austin and Goodfellow 1979) Green and Bousfield 1983
               10 Methylobacterium nodulans Jourand et al. 2004
               11 Methylobacterium podarium Anesti et al. 2006
               12 Methylobacterium populi Van Aken et al. 2004
               13 Methylobacterium radiotolerans corrig. (Ito and Iizuka 1971) Green and Bousfield 1983
               14 Methylobacterium rhodesianum Green et al. 1988
               15 Methylobacterium rhodinum corrig. (Heumann 1962) Green and Bousfield 1983
               16 Methylobacterium suomiense Doronina et al. 2002
               17 Methylobacterium thiocyanatum Wood et al. 1999
               18 Methylobacterium variabile Gallego et al. 2005
               19 Methylobacterium zatmanii Green et al. 1988