prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   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 Sphingomonadales Yabuuchi and Kosako 2006
           Family Sphingomonadaceae Kosako et al. 2000
             01 Genus Blastomonas Sly and Cahill 1997
             02 Genus Erythromonas Yurkov et al. 1997 see Genus Blastomonas Sly and Cahill 1997
             03 Genus Hephaestia Felfoldi et al. 2014
             04 Genus Novosphingobium Takeuchi et al. 2001
             05 Genus Parablastomonas Ren et al. 2015
             06 Genus Parasphingopyxis Uchida et al. 2012
             07 Genus Polymorphobacter Fukuda et al. 2014
             08 Genus Sandaracinobacter Yurkov et al. 1997
             09 Genus Sandarakinorhabdus Gich and Overmann 2006
             10 Genus Sphingoaurantiacus Kim et al. 2016
             11 Genus Sphingobium Takeuchi et al. 2001
             12 Genus Sphingomicrobium Kämpfer et al. 2012
             13 Genus Sphingomonas Yabuuchi et al. 1990
             14 Genus Sphingopyxis Takeuchi et al. 2001
             15 Genus Sphingorhabdus Jogler et al. 2013
             16 Genus Sphingosinicella Maruyama et al. 2006
             17 Genus Stakelama Chen et al. 2010
             18 Genus Zymomonas Kluyver and van Niel 1936 (Approved Lists 1980)