prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Bacteroidetes" Krieg et al. 2012
       Class Sphingobacteriia Kämpfer 2012 [monotypic]
         Order Sphingobacteriales Kämpfer 2012
           Family Saprospiraceae Krieg et al. 2012
             1 Genus Aureispira Hosoya et al. 2006
             2 Genus Haliscomenobacter van Veen et al. 1973 (Approved Lists 1980)
             3 Genus Lewinella Sly et al. 1998
             4 Genus Phaeodactylibacter Chen et al. 2014
             5 Genus Saprospira Gross 1911 (Approved Lists 1980)