eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
     Subkingdom Sarcomastigota Cavalier-Smith, 1983 [paraphyletic] see [unranked] dorsates Cavalier-Smith, 2021
       Infrakingdom Diacentrida Cavalier-Smith, 2021 [paraphyletic] see [unranked] torcids Cavalier-Smith, 2021
         Phylum Apusozoa Cavalier-Smith, 1997 [paraphyletic?] see Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
           Class Thecomonadea Cavalier-Smith, 1993 [sister group to excluded taxa] [monotypic]
             1 Order Apusomonadida Karpov & Mylnikov, 1989