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
       Family Simplicimonadidae Cepicka, Hampl & Kulda, 2010
         Genus Simplicimonasᵀ Cepicka, Hampl & Kulda, 2010
           1 Simplicimonas moskowitziᵀ (Honigberg, 1963)
           2 Simplicimonas cuniculi (Tanabe, 1926)
           3 Simplicimonas axostylis (Kirby, 1931)
           4 Simplicimonas caviae (Nie, 1950)
           5 Simplicimonas pistillum (Nie, 1950)
           6 Simplicimonas lori (Abraham, 1962)
           7 Simplicimonas molae (Noble & Noble, 1966)
           8 Simplicimonas similis Cepicka, Hampl & Kulda, 2010