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)
         1 Family Chlorobacteriaceae Geitler and Pascher 1925 nom. inval.
         2 Family Methanomonadeceae (sic) "Breed et al. 1957" nom. inval. see Family Methanomonadaceae Breed et al. 1957 nom. inval.
         3 Family Nitrobacteriaceae (sic) Buchanan 1917 nom. inval. see Family Nitrobacteraceae corrig. Buchanan 1917 (Approved Lists 1980)
         4 Family Pseudomonadaceae Winslow et al. 1917 nom. inval. see Family Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980)
         5 Family Siderocapsaceae Pribram 1929 nom. inval.
         6 Family Spirillaceae Migula 1894 nom. inval.
         7 Family Thiobacteriaceae Orla-Jensen 1909 nom. inval. see Family Thiotrichaceae Pringsheim 1949 nom. inval.