Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
   Class Tritrichomonadea Cepicka, Hampl & Kulda, 2010 see Order Tritrichomonadida Cepicka, Hampl & Kulda, 2010
     Order Tritrichomonadida Cepicka, Hampl & Kulda, 2010 - tritrichomonadids
       1 Family Tritrichomonadidae Honigberg, 1963
       2 Family Dientamoebidae Grassé, 1953
       3 Family Monocercomonadidae Kirby, 1944
       4 Family Simplicimonadidae Cepicka, Hampl & Kulda, 2010