plantenrijk Haeckel (1866) - plants
   [Division] Protophyta Sachs (1874) - primitive plants
     Class Schizomycetes Nägeli 1857 nom. inval. - bacteria and related forms see Class Schizomycetes Nägeli 1857 (Approved Lists 1980) nom. illeg., nom. rej.
       Order Pseudomonadales Orla-Jensen 1921 nom. inval. see Order Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980)
         Family Pseudomonadaceae Winslow et al. 1917 nom. inval. see Family Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)
           1 Genus Acetobacter Beijerinck 1898 nom. inval.
           2 Genus Aeromonas Stanier 1943 nom. cons., nom. inval. see Genus Aeromonas Stanier 1943 nom. cons. (Approved Lists 1980)
           3 Genus Azotomonas Orla-Jensen 1909 nom. nud.
           4 Genus Halobacterium Elazari-Volcani 1957 nom. inval.
           5 Genus Pseudomonas Migula 1894 nom. cons., nom. inval. see Genus Pseudomonas Migula 1894 nom. cons. (Approved Lists 1980)