Kingdom Protozoa Goldfuss, 1818 - protozoa
   ?Phylum Apusozoa Cavalier-Smith, 1997 see Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
     Class Thecomonadea Cavalier-Smith, 1993
       Order Ancyromonadida Cavalier-Smith, 1998 see Order Planomonadida Cavalier-Smith, 2008
         1 Genus Ancyromonas Kent, 1880