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 Beggiatoales Buchanan 1957 nom. inval. see Order Beggiatoales Buchanan 1957 (Approved Lists 1980)
         Family Beggiatoaceae Migula 1894 nom. inval. see Family Beggiatoaceae Migula 1894 (Approved Lists 1980)
           1 Genus Beggiatoa Trevisan 1842 nom. cons., nom. inval. see Genus Beggiatoa Trevisan 1842 nom. cons. (Approved Lists 1980)