plantenrijk Haeckel (1866) - plants
   [Division] Protophyta Sachs 1874 - primitive plants
     Class Schizomycetes Nägeli 1857 (Approved Lists 1980) - bacteria and related forms
       Order Eubacteriales Buchanan 1917 (Approved Lists 1980) see Order Clostridiales Prévot 1953 (Approved Lists 1980)
         Family Achromobacteriaceae see Family Alcaligenaceae De Ley et al. 1986
           1 Genus Achromobacter Bergey et al. 1923
           2 Genus Agarbacterium
           3 Genus Alcaligenes Castellani and Chalmers 1919 (Approved Lists 1980)
           4 Genus Flavobacterium Bergey et al. 1923 (Approved Lists 1980)