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 Spirochaetales Buchanan 1917 nom. inval. see Order Spirochaetales Buchanan 1917 (Approved Lists 1980)
         1 Family Spirochaetaceae "Swellengrebel 1907" nom. inval. see Family Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980)
         2 Family Treponemataceae Robinson 1948 nom. inval. see Family Treponemataceae Robinson 1948 (Approved Lists 1980)