procaryotes
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum Bacteroidetes Garrity and Holt 2001 nom. inval. see Phylum Bacteroidetes Krieg et al. 2012 stat. inval.
       Class "Sphingobacteria" "Garrity and Holt 2001" nom. nud. [monotypic] see Class Sphingobacteriia Kämpfer 2012
         Order "Sphingobacteriales" "Garrity and Holt 2001" nom. nud. see Order Sphingobacteriales Kämpfer 2012
           Family "Flexibacteraceae" "Garrity and Holt 2001" nom. nud. see Family Flexibacteraceae García-López et al. 2020
             01 Genus Flexibacter Soriano 1945 (Approved Lists 1980)
             02 Genus Cyclobacterium Raj and Maloy 1990
             03 Genus Cytophaga Winogradsky 1929 (Approved Lists 1980)
             04 Genus Flectobacillus Larkin et al. 1977 (Approved Lists 1980)
             05 Genus Hymenobacter Hirsch et al. 1999
             06 Genus Meniscus Irgens 1977 (Approved Lists 1980)
             07 Genus Microscilla Pringsheim 1951 (Approved Lists 1980)
             08 Genus Runella Larkin and Williams 1978 (Approved Lists 1980)
             09 Genus Spirosoma Migula 1894 (Approved Lists 1980)
             10 Genus Sporocytophaga Stanier 1940 (Approved Lists 1980)