procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Proteobacteria Garrity and Holt 2001 nom. nud. see Phylum Proteobacteria Garrity et al. 2005 stat. inval.
       Class "Alphaproteobacteria" "Garrity and Holt 2001" nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
         Order "Rhizobiales" "Garrity and Holt 2001" nom. nud. see Order Rhizobiales Kuykendall 2006
           Family "Methylobacteriaceae" "Garrity and Holt 2001" nom. nud. see Family Methylobacteriaceae Garrity et al. 2006
             1 Genus Methylobacterium Patt et al. 1976 (Approved Lists 1980)
             2 Genus Protomonas Urakami and Komagata 1984 nom. illeg. see Genus Methylobacterium Patt et al. 1976 (Approved Lists 1980)
             3 Genus Roseomonas Rihs et al. 1998