Procaryotic Genera
Count: [*] 25p;39c;84o;215f;1008g [28 May 2016]
   Domain "Bacteria" Woese et al. 1990
  Count: [*] 23p;31c;72o;194f;935g [28 May 2016]
     Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005
    Count: [*] 5c;34o;72f;430g [27 May 2016]
       Class "Alphaproteobacteria" Garrity and Holt 2001 nom. nud. see Class Alphaproteobacteria Garrity et al. 2006
      Count: [*] 6o;18f;133g [27 May 2016]
         Order "Sphingomonadales" [monotypic] see Order Sphingomonadales Yabuuchi and Kosako 2006
        Count: [*] 1f;9g [27 May 2016]
           Family Sphingomonadaceae Kosako et al. 2000
          Count: [*] 9g [27 May 2016]
             1 Genus Sphingomonasᵀ Yabuuchi et al. 1990
            Count: -
             2 Genus Blastomonas Sly and Cahill 1997
            Count: -
             3 Genus Erythrobacter Shiba and Simidu 1982
            Count: -
             4 Genus Erythromicrobium Yurkov et al. 1994
            Count: -
             5 Genus Erythromonas Yurkov et al. 1997 see Genus Blastomonas Sly and Cahill 1997
            Count: -
             6 Genus Porphyrobacter Fuerst et al. 1993
            Count: -
             7 Genus Rhizomonas van Bruggen et al. 1990
            Count: -
             8 Genus Sandaracinobacter Yurkov et al. 1997
            Count: -
             9 Genus Zymomonas Kluyver and van Niel 1936 (Approved Lists 1980)
            Count: -