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)
         Family Treponemataceae Robinson 1948 nom. inval. see Family Treponemataceae Robinson 1948 (Approved Lists 1980)
           Genus Leptospira Noguchi 1917 nom. inval. see Genus Leptospira Noguchi 1917 (Approved Lists 1980)