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 Eubacteriales Buchanan 1917 nom. inval. see Order Eubacteriales Buchanan 1917 (Approved Lists 1980)
         Family Enterobacteriaceae Rahn 1937 nom. cons., nom. inval. see Family Enterobacteriaceae Rahn 1937 nom. cons. (Approved Lists 1980)
           Genus Proteus Hauser 1885 nom. inval. see Genus Proteus Hauser 1885 (Approved Lists 1980) nom. cons.