eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
     Subkingdom Natozoa Cavalier-Smith, 2021 [paraphyletic]
       Infrakingdom Eozoa Cavalier-Smith, 1997 see Clade Discoba Simpson 2009
         Superphylum Discicristata Cavalier-Smith, 1998
           Phylum Euglenozoa Cavalier-Smith, 1981
             Subphylum Postgaardia Cavalier-Smith, 2016
               1 Genus Bihospites Breglia, Yubuki, Hoppenrath & Leander, 2010
               2 Genus Calkinsia Lackey, 1960
               3 Genus Postgaardi T. Fenchel et al., 1995