plantenrijk Haeckel (1866) - plants
   [Division] Protophyta Sachs 1874 - primitive plants
     Class Schizomycetes Nägeli 1857 (Approved Lists 1980) - bacteria and related forms
       Order Hyphomicrobiales Douglas 1957 (Approved Lists 1980) see Order Rhizobiales Kuykendall 2006
         Family Pasteuriaceae Laurent 1890 (Approved Lists 1980)
           Genus Pasteuria Metchnikoff 1888 (Approved Lists 1980)