plantenrijk Haeckel (1866) - plants
   [Division] Protophyta Sachs 1874 - primitive plants
     Class Schizomycetes Nägeli 1857 (Approved Lists 1980) - bacteria and related forms
       Order Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980)
         Family Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)
           1 Genus Acetobacter Beijerinck 1898 (Approved Lists 1980)
           2 Genus Aeromonas Stanier 1943 (Approved Lists 1980)
           3 Genus Azotomonas see Genus Azomonas Winogradsky 1938 (Approved Lists 1980)
           4 Genus Halobacterium Elazari-Volcani 1957 (Approved Lists 1980)
           5 Genus Pseudomonas Migula 1894 (Approved Lists 1980)