Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
   Kingdom Chlorobiota Jeffrey (1971), nom. inval. see Kingdom Chlorobiota C.Jeffrey ex Doweld (2001)
     Subkingdom Streptobionta see [unranked] Streptophytina Lewis & McCourt (2004)
       Infrakingdom Zygnemobiotes [monotypic]
         Division Zygnemophyta [monotypic]
           Class Zygnemophyceae - conjugates see Class Zygnematophyceae C.Hoek, D.G.Mann & H.M. Jahns (1995), nom. inval.