eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
     Subkingdom Sarcomastigota Cavalier-Smith, 1983 [paraphyletic] see [unranked] dorsates Cavalier-Smith, 2021
       Phylum Sulcozoa Cavalier-Smith, 2012 [paraphyletic] see [unranked] dorsates Cavalier-Smith, 2021
         Subphylum Varisulca Cavalier-Smith, 2012 see [unranked] Varisulca Cavalier-Smith, 2012
           Superclass Multirhiza Cavalier-Smith, 2012
             Class Diphyllatea Cavalier-Smith, 2003 [monotypic]
               Order Diphylleida Cavalier-Smith, 1993
                 1 Family Diphylleidae Cavalier-Smith, 1993
                 2 Family Sulcomonadidae Cavalier-Smith, 2012 [monotypic]